If you put the "countries" in a column (i.e. cells A2 through A51) and put the "keywords" in a row (i.e. cells B1 through K1) and then in cell B2 you put =CONCATENATE(B$1," ",$A2) and then copy cell B2 and paste it into the big grid (i.e. B2 through K51).
The excel tip above is very helpful. Do you happen to have any other tips or tools (or know of whre I can find any) using excel to make expansive keyword lists quickly. I created one that I would be happy to share. It basically creates titles with captial letters.