Perhaps you should try some spelling variations:
yang guang » yang yang, yang liang
long thanh » luong thanh, long han, truong thanh
long trinh » long trip
chia yuan » chiao yuan, chih yuan, chu yuan
yuan wang » yan wang, yuan kang, yuan chang
yan guan » gan guan, yan yuan, yihan guan
wang qin » wang lin, wang qiao, wang jing

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 ((yan guan) OR (yang guang)) chia yuan wang qin ((long thanh) OR (long trinh)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan guan) OR (yang guang)) chia yuan wang qin ((long thanh) or (long trinh)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan guan) OR (yang guang)) chia yuan wang qin ((long thanh) or (long trinh)) ;*.