@WeiZhong: Does Approach0 distinguish between "sin" and "sinh"? Is there any way to specify in this query that I am looking specifically for the hyperbolic sine?

@MartinR short answer is No, you cannot specify exact matching in current version.

The two things are treated similarly in approach0 though, they are of the same token type, but different symbols. Approach0 prioritizes token+symbol matches than token matches alone.

So if you do not see "sinh" in your search results of that query, then probably there is no "sinh" approach0 has found in its indices. Because otherwise approach0 will prioritize "sinh" result to the top.

However, the ranking also considers many other factors, like math expression structure similarity and expression size. This makes it possible that some of the exact matches are not at the top, so you may have to scroll down or look through a few pages for relevant results, unfortunately, I do not have much time recently to push a0 forward.

@MartinR That's true, I personally find the small font in Windows Edge unable to read, so I have decided to change. Thank you @MartinSleziak for sharing the "bookmarklet solution", it can be very useful for this case.