Vocabulary

I am having a real tough time using vocabulary words to explain the 3 questions with.
The questions themselves are not that hard to answer and i already answered them but its really hard to find vocabulary words to go along with the answers. Can anyone please help???

i am having the most difficulty with number 3 in particular. I mean i must have read the vocabulary list like 5 times and i cannot find 3 words to describe the guest worker program in germany.