Perhaps you should try some spelling variations:
long thanh » luong thanh, long han, long trinh
fang yuan » wang yuhan, wang yan, meng yuan
yan yuan » yan guan, nan yan, yan clan
chen tan » chen tain, chen yang, chen jian
tan yong » tan hong, tan kong, tan yang
hong ghi » zhong zhi, hong g, hong hai
wang » wing, wan

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: (wang OR lang) ((yan yuan) OR (fang yuan)) chen tan yong kim ((long thanh) OR (hong ghi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or lang) ((yan yuan) OR (fang yuan)) chen tan yong kim ((long thanh) or (hong ghi)) ;~".
• Adding a wildcard symbol may retrieve word variants: (wang or lang) ((yan yuan) OR (fang yuan)) chen tan yong kim ((long thanh) or (hong ghi)) ;*.