Why search engine on this forum find nothing if I write "Sky Force Reloaded".

So, why search engine find ONE of topic game, that it is in Game Releases and Game Releases by category. So find must twice topics.

[lifehacker]

It finds it just fine when I try. search.php?keywords=sky+force+reloaded&terms=all&author=&sc=1&sf=titleonly&sk=t&sd=d&sr=topics&st=0&ch=300&t=0&submit=Search