Perhaps you should try some spelling variations:
douglas bin » douglas b, douglas john, douglas mair
tan yang » dan yang, tan ying, tao yang
tan yong » tan hong, tan kong, tan ying
ying hua » ming hua, wang hua, ying zhu
hua last » a last, his last
thing » things, think, thin
zeng » eng, feng, peng

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: ((((tan yang) OR (tan yong))) OR (du yang)) ying hua last thing zeng douglas bin ;~.
• Adding a wildcard symbol may retrieve word variants: ((((tan yang) or (tan yong))) or (du yang)) ying hua last thing zeng douglas bin ;*.