Perhaps you should try some spelling variations:
yang davis » wang david, yang dali
test using » tests using, tested using, testing using
wang yong » wang yang, wang hyoung, wang yan
yong yang » yang yang, dong yang, ying yang
a housing » 4 housing
kong saur » kong sar, kong your, wong sau
kong siu » kong eiu, wong siu, 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: wang yong yang davis ((test using) OR (a housing)) a ((kong saur) OR (kong siu)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yong yang davis ((test using) or (a housing)) a ((kong saur) or (kong siu)) ;*.