Collocations

Question 1

a sad feeling mixed with pleasure when you think of happy times in the past (collocation?)

Answer 1

a sense/wave/pang of nostalgia /nɒˈstældʒə/

Question 2

Cách mạng khoa học/nông nghiệp/công nghiệp…

Answer 2

Scientific/ Agrarian/ Industrial revolution
Revolution in sth (A revolution in information technology is taking place.)

Question 3

A litany of sth

Answer 3

A long list of unpleasant thing, especially things that are repeated
Ex: litany of complaints