Hello,
For now if I type "find bug" in search textbox search returns all files where are this words in that order no matter where they are placed. I.e. file with text "find crtitical bug" will be 'valid' result.
If I trying to find "skin/skin" phrase I will got many "trash" files where "skin" placed 2 times but not exact phrase.

Also it's useful to find exact method call with specifed parameters. As described in this (I think related to this task) discussion 3 years ago:

Bitbucket Code Search EXACT method call

So I suggest to add a way to search exact phrase matches.

Example:
Let's say we have 3 source code files with texts:

1. " Skin [] skins = { new Skin (1), new Skin (2) } ".
2. " Url = '//path/skin/skin/static' ".
3. " We use skin generator to construct skin at runtime ".

Do:
Type in search textbox: "skin/skin"

Actual: all 3 files are in the search result
Expected: only file 2 are shown.