Vlookup with two criteria

I have the following content in column A, B and C

Cost element Cost object Area
709015 WTK.RND.0360.EN.EX Other
972236 WTK.RND.0360.EN.EX Drilling & Production
972261 WTK.RND.0360.EN.EX Drilling & Production
979455 WTK.RND.0360.EN.EX Upstream Technology
709015 WTK.RND.0360.EN.PR Other
972237 WTK.RND.0360.EN.PR Drilling & Production
972260 WTK.RND.0360.EN.PR Drilling & Production
977745 WTK.RND.0360.EN.PR Project Development
979456 WTK.RND.0360.EN.PR Upstream Technology
979508 WTK.RND.0360.EN.PR Other
709015 WTK.RND.0371.EN.EX Credit
709015 WTK.RND.0371.EN.PR Credit

I want to lookup the content of column C if there is match with the content in A and B combined. Lookup values for A and B will be in Z1 and Z2. An array function is OK.