Perhaps you should try some spelling variations:
how japan » how japan's, law japan, new japan
japan ren » japan re, japan real, japan rok
tong shui » cong shu, gong hui
tuan aid » can aid, tuan anh
yang jin » yang jie, yang jun, shang jin
ying jin » jing ji, yang jie
tong hui » wang hui

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tuan aid how japan ren ((yang jin) OR (ying jin)) ((tong shui) OR (tong hui)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tuan aid how japan ren ((yang jin) OR (ying jin)) ((tong shui) or (tong hui)) ;~".
• Adding a wildcard symbol may retrieve word variants: tuan aid how japan ren ((yang jin) OR (ying jin)) ((tong shui) or (tong hui)) ;*.