Perhaps you should try some spelling variations:
era housing » a housing, rural housing, core housing
test using » tests using, tested using, testing using
kong saur » kong sar, kong your, wong sau
yang api » yang dali, yang di, yang jui
kong siu » kong eiu, wong siu, dong sin
wai yan » wei yang
wang » wing, wan, lang

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

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