Perhaps you should try some spelling variations:
china call » china fall, china small, china case
china all » china fall, china als, china small
yang july » yang judy, yang jun
cong van » congo can, duong van, cong sun
yang jui » yang judy, yang di, yang xi
lang hua » wang hua, wang hui, dong hua
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 ham ((china all) OR (china call)) ((((yang jui) OR (yang yi))) OR (yang july)) lang hua ;~.
• Adding a wildcard symbol may retrieve word variants: cong van ham ((china all) or (china call)) ((((yang jui) or (yang yi))) or (yang july)) lang hua ;*.