differences of lifestyle (single,single mom, divorce, nuclear family...) of these country: VietNam, Thailand, U.S, Korea.
Here is how to do it easily!! :-) I know what you mean about "too much info."
forget Thailand Korea, and the U.S., and just google about Vietnam.
Write some paragraphs all about Vietnam family structure.
Then, start over with the next country.
Only when you have done this for each country can you go back and write a good introduction paragraph. When you have written about every country, you will think of a great thesis statement!
:-)