Perhaps you should try some spelling variations:
china all » china fall, china als, china small
china aus » china als, china auf, china aids
yang july » yang judy, yang jun
cong van » congo can, duong van, cong sun
van hang » van hung, van thanh, van ham
yang jui » yang judy, yang di, yang xi
wang hui » wang hua, wang zhi, wang wei
yang yi » yang di, yang xi

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: cong van hang ((china all) OR (china aus)) ((((yang jui) OR (yang yi))) OR (yang july)) wang hui ;~.
• Adding a wildcard symbol may retrieve word variants: cong van hang ((china all) or (china aus)) ((((yang jui) or (yang yi))) or (yang july)) wang hui ;*.