Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
dong sign » dong sin, among sign, dong bin
phan thi » pham thi, nhan thi, tran thi
hong ghi » zhong zhi, hong g
hong hai » shang hai, zhong tai, dang hai
hua ren » hua chen
han thi » nhan thi, ha thi, hien thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) or (dong sign)) ya hua ren ((han thi) OR (phan thi)) ((hong ghi) or (hong hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (dong sign)) ya hua ren ((han thi) OR (phan thi)) ((hong ghi) OR (hong hai)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (dong sign)) ya hua ren ((han thi) OR (phan thi)) ((hong ghi) or (hong hai)) ;".
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (dong sign)) ya hua ren ((han thi) OR (phan thi)) ((hong ghi) or (hong hai)) ;*.