Perhaps you should try some spelling variations:
tested usindg » tested using, test using, tests using
wang kyoung » wang hyoung, hwang byoung, wang yong
yang david » wang david, young david, deng david
3 housing » 4 housing, a housing
usindg » usigndg, usinddg, uskindg
housing » housigng, housindg, housking
sin » sign, sind, skin

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 kyoung yang david ((tested usindg) OR (3 housing)) a ((kong sar) OR (dong sin)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang kyoung yang david ((tested usindg) or (3 housing)) a ((kong sar) or (dong sin)) ;*.