Improve issue search

The screenshot shows a search for the word "eina" in the issue tracker of a project of mine.

All of the following searches should return one or more results:

"eina escollir", "eina admin", "eina place_id", "eina child", "escollir referència", "admin escollir"

NONE of them does.

This is pathetic. If I cannot trust the search engine to find issues whose very titles contain the keywords, the search is completely useless.