Perhaps you should try some spelling variations:
tested using » tests using, testing using, system using
test using » tests using, testing using
kong saur » kong sar, kong siu, kong your
yang api » yang dali, yang di, yang jui
wan yan » wang yan, nan yan, wang yang
wai yan » wang yan, wei yang
a kong » w kong, tan kong, nan kong

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: ((wan yan) OR (wai yan)) yang api ((tested using) OR (test using)) a kong saur ;~.
• Adding a wildcard symbol may retrieve word variants: ((wan yan) or (wai yan)) yang api ((tested using) or (test using)) a kong saur ;*.