Hi ,
An alternative is to lookup the concatenated values , so that when you lookup an item , you are actually looking up a concatenated value.
For example , if your data consists of one column for country codes , and another for customer codes , if you wish to search for a customer code of "1102" in a country with code "PL" , you can concatenate the country codes and the customer codes in a helper column , so that now you can lookup the value "PL1102" in this helper column.
This helper column will have to be within the data table , in case you want to use the VLOOKUP function , but can be outside the data table in a remote column if you can use the MATCH and INDEX functions.
Narayan