It seems that there is no exact match support for questions/answers.
We discovered today that for whatever reason, bunch of urls contains wrong slash (e.g. “int”, instead of “int/”, and as a result, they show up incorrectly sometimes (as "int “, for example”.
Since there is no easy way to replace existing answers, I tried to search for such urls and then do individual replacement. However, it seems to quite challenging to find such urls using exact matches.
For example, when I shared for "who.int ", it shows all matches for “who” as well.