Perhaps you should try some spelling variations:
wang david » deng david, long david, ng david
test using » tests using, tested using, testing using
wang yong » wang yang, wang hyoung, wang yan
yong wang » hong wang, yong phang, ping wang
4 housing » a housing
kong your » kong young, knowing your
using » usigng, usindg, usking
housing » housigng, housindg, housking
sin » sign, sind, skin

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 wang david ((test using) OR (4 housing)) a ((kong your) OR (dong sin)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yong wang david ((test using) or (4 housing)) a ((kong your) or (dong sin)) ;*.