Each set of 3 letters consists of consecutive 
letters taken from inside a common word.
The first word of each pair is a nationality and the word 
opposite it goes with it to complete a familiar phrase.
There is no need to rearrange any letters.

For example:   sWISs   cHEEse 

1) GLI_____  UFF_____

2) UTC_____  REA_____

3) HIN_____  ECK_____

4) ENC_____  EAV_____

5) ANI_____  STR_____

6) SSI_____  LET_____