Perhaps you should try some spelling variations:
yang liang » wang liang, yan liang, yang yang
duong van » cong van, duong anh
sang minh » kang minah, anh minh, song min
minh kang » minh cong, jin kang
kang kong » king kong, kang young, hong kong
gan guan » yan guan, quan guan, fan guon
kong siu » kong eiu, wong siu, dong sin
dong di » dong sin

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: ((duong van) OR (dong di)) ((yang liang) OR (gan guan)) sang minh kang kong siu ;~.
• Adding a wildcard symbol may retrieve word variants: ((duong van) or (dong di)) ((yang liang) or (gan guan)) sang minh kang kong siu ;*.