You need to put double quotes around the text strings, like this:

=IF(A1="MIE","Made in Egypt",IF(A1="MIF","Made in France",IF(A1="MIC","Made in Cyprus")))

I've removed some redundant brackets. If you have many more codes, then you could use VLOOKUP with a simple table of codes and meanings, and avoid multiple IFs.

Hope this helps.

Pete