How do I search for specific combined words?

I tried putting them in quotes but that doesn't work. Like "rF2 cars" returns posts with "rF2" and posts with "cars" but not posts with just "rF2 cars".

 

have you tried adding and in between? I mean (your example): rF2 and cars

 

In another vBulletin 4.2.2 Forum it works with the semicolon as seperator between the words you are searching for.
But that don't seems to work here.