Excel 2007 : Multiple VLOOKUP

Hello,

Searched EVERY WHERE, and cannot find a thing.
Can someone please help me?

Trying to match col A & B and both sheets and have col 3 on EX1 input on EX2.

I've read about INDEX, but VLOOKUP seems the easiest.

I can use VLOOKUP for 1 colums but not multiple.

Thanks