If I remove the apostrophe from a word, “Find” locates it, With the apostrophe left it, it fails.
Try searching with RegEx if you are using smart quotes.
I have searched for the quote, smart quote, double quotes, smart left quote, smart right quote, and it doesn’t matter, the search fails to find it/them.
If you choose RegEx as the search type you can use a full-stop (period) to mean “any character”, so if you were looking for “Darwin’s” (for example), the search string “Darwin.s” would find it, regardless of whether you used smart quotes.
I’ve noticed that spell-check on words with apostrophes are not working. So a word like “wasn’t” will show as a spelling error because it is only reading “wasn” and not reading the apostrophe or anything past it.
This works (the RegEx search). However, doing a “Whole Word” search does not pick up the apostrophe. Search begins fairly quickly and picked up my search for “isn’t” by the time I had typed “isn” showing 4 different documents. However, once you put the apostrophe in, the found documents goes to zero.
The search issue, with non-RegEx operators failing to return results when searching with straight quotes, has been filed. Thanks! In the meanwhile, you should be able to get results by searching using a smart quote/apostrophe in the search term (assuming you are using smart quotes within the main text; if you’re using straight quotes, use the RegEx search operator with a straight quote in the search term).