There is no definite answer to which full-text search engine is best because every full-text search engine has its advantages and disadvantages, depending on the usage scenario and needs. Here are some common full-text search engines: 1 Google Full-text Search:Google Full-text Search is one of the most commonly used full-text search engines. It can search the vast amount of text on the Internet. The advantage is that you can find any text no matter where it is on the internet and you can read the search results in full. The downside is that search results may be protected by copyright or restrictions, and there may be advertisements and junk information. 2. Baidu Full-text Search: Baidu Full-text Search is another popular full-text search engine that can search for texts on the Chinese Internet. The advantage was that the quality of the search results was relatively high and there might be some useful information. The downside is that the number of search results may not be as good as a full-text search on Google. Bing Full-text Search: Bing Full-text Search is a full-text search engine developed by Microsoft.It can search for text on the English Internet. The advantage is that the search results are of high quality and can help users find specific information. The disadvantage was that it might require a browser from Microsoft.com. Therefore, the choice of full-text search engine depended on the needs and usage scenarios. If you need to search for text on the Chinese Internet, then Baidu full-text search may be a better choice; if you need to search for text on the English Internet, then Bing full-text search may be more suitable.