Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
dali test » davis test, data test, api test
housing a » housing _, housing bank
dong sign » dong sin, among sign, dong bin
yan yang » yao yang, dan yang, tan yang
kong siu » kong eiu, wong siu, dong sin
ai test » api test, i test, ii test
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 yang) OR (yang yang)) ((dali test) or (ai test)) housing a ((kong siu) or (dong sign)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan yang) OR (yang yang)) ((dali test) OR (ai test)) housing a ((kong siu) OR (dong sign)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yang) OR (yang yang)) ((dali test) or (ai test)) housing a ((kong siu) or (dong sign)) ;".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yang) OR (yang yang)) ((dali test) or (ai test)) housing a ((kong siu) or (dong sign)) ;*.