Perhaps you should try some spelling variations:
test housing » cost housing, era housing, tested using
test using » tests using, tested using, testing using
kong saur » kong siu, kong your, wong sau
yan yang » yang yang, yao yang, dan yang
yang api » yang dali, yang di, yang jui
wan yan » wang yan, nan yan, wai yan
sar » sara, star

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan yang api ((test housing) or (test using)) a ((kong saur) OR (kong sar)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan yang api ((test housing) OR (test using)) a ((kong saur) OR (kong sar)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan yang api ((test housing) or (test using)) a ((kong saur) OR (kong sar)) ;".
• Adding a wildcard symbol may retrieve word variants: wan yan yang api ((test housing) or (test using)) a ((kong saur) OR (kong sar)) ;*.