Perhaps you should try some spelling variations:
era housing » a housing, rural housing, core housing
test using » tests using, tested using, testing using
yang dali » yang di, bang dai, yang all
yang api » yang di, yang jui, yang xi
nan kong » tan kong
kong eiu » tonga eiu
wang » wing, wan, lang

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 yan ((yang api) OR (yang dali)) ((era housing) OR (test using)) nan kong eiu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((yang api) OR (yang dali)) ((era housing) or (test using)) nan kong eiu ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan ((yang api) OR (yang dali)) ((era housing) or (test using)) nan kong eiu ;*.