Perhaps you should try some spelling variations:
irene mah » irene m, irene a
siew hong » siew keong, siew kheng, sek hong
wang dan » wang yan, wang ban, wang yidan
yang hui » yang jui, yang muxi, zhang hui
wang hui » wang hua, wang zhi, wang wei
wan dan » wan daud, awam dan, dan dana
hong vu » hoang vu, hong yu, hong tou

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 dan) OR (wang dan)) ((yang hui) OR (wang hui)) irene mah siew hong vu ;~.
• Adding a wildcard symbol may retrieve word variants: ((wan dan) or (wang dan)) ((yang hui) or (wang hui)) irene mah siew hong vu ;*.