Perhaps you should try some spelling variations:
long thanh » luong thanh, long trinh, truong thanh
tan yang » tan ying, tan yong, tao yang
dan yang » daun yang, wang yang, yang yang
long han » long chain, long haul, jeong han
hong hai » shang hai, zhong tai, dang hai
yan can » yan clan, man can, yan cong
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan can china ((tan yang) OR (dan yang)) lin ((((long han) or (long thanh))) or (hong hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan can china ((tan yang) OR (dan yang)) lin ((((long han) OR (long thanh))) OR (hong hai)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan can china ((tan yang) OR (dan yang)) lin ((((long han) or (long thanh))) or (hong hai)) ;*".