compare 2 colume

[deni]

I have 3 columns

A1
00-00-00
00-00-34

A2
text
text

A3
00-00-00-12-23-45-fd
00-22-11-dr-23-45-sd

the value on A1 need to be found on A3 and if is true add the value from A2
I’m using vlookup but is not working any advice?

[robert111]

if(left(A3,8)=a1,concatenate(a3,a2),"")