You can try specialized fanfiction forums related to the universes that Toph and Edward come from. There might be threads dedicated to sharing or discussing 'toph vs edward' fanfictions. Additionally, some Tumblr blogs might also reblog or create such fanfictions. It's all about exploring different online communities dedicated to these characters or their respective shows/books.
Archive of Our Own (AO3) is a great place to start. It has a vast collection of fanfictions, and you can use its search function to look for 'toph vs edward' specifically.
A practical answer is Chapter 28, because it turns the idea into a concrete scene. The chapter opens with The next evening, Jiang Yan drove home seething with rage., adds pressure through Fuck, who's there, standing in the middle of the night scaring the shit..., and ends on Lili then kicked his.
Chapter 914, "A Married Daughter is Like Spilled Water!", is the clearest early answer because it turns Yu Li's situation into a concrete plot event. Early on, Jiang Li let out a cold laugh.. By the end, This revelation got the fans even more excited..
Chapter 863, "Your Marriage is a Calamity", is the clearest early answer because a shaky connection becomes usable in the plot. A useful checkpoint is the way the scene starts with The raffle results came out quickly. and follows through with Things have been smooth sailing between us..
Chapter 868, "The Story of the Old Sea King Coming Ashore", is the clearest early answer because it turns Life Palace's situation into a concrete plot event. The chapter turns that into something concrete by moving from But despite Jiang Li saying so, the barrage in the livestream didn't...
A practical answer is Chapter 5, because it turns the idea into a concrete scene. The chapter opens with Actually, when Manager Fang saw Jiang Li, he was somewhat surprised., adds pressure through How the hell did you get in?!, and ends on Recently, he did suspect that his wife was cheating on.
Chapter 899, "It's actually a seal script?!", is the clearest early answer because it turns Some Jiang Wasn's situation into a concrete plot event.
The best chapter pointer here is Chapter 24, "The Cause of Jiang Shixu's Illness". It opens with Not only that, even the non-mainstream photos she had previously posted on... and closes on Shi Xu rarely feels like going out, so that's nice." Aware that he....
Chapter 874, "All the Same", is the clearest early answer because it turns Shi's situation into a concrete plot event. Early on, This family is surnamed Shi, and they have lived in this village for.... By the end, It might take a while to find them." "However..." she smiled, "I've....
The best chapter pointer here is Chapter 9, "The Qiao Family's business isn't big, but they have quite the audacity". It opens with Exactly, the Qiao Family isn't that great either. and closes on Qiao, unable to save face, slapped her daughter across the face, "Didn't I....
Chapter 907, "Disgusting Clothes", is the clearest early answer because it turns Jiang Buchen's situation into a concrete plot event.