Search by tags dont work

hi, i have problem when a want to make search by tags
there are some task with tags, but when i make a search those task did not appear


why is that happening? i use lot of tags, but 90% of them did not appear when i make a search.


sorry for double post, but new users can upload only one image

try this to see result:
tag:doing

same thing with all possible combination…its seem that there is some problem with xampp

It seems You used double quotation based on the screenshot