Perhaps you should try some spelling variations:
yan liang » yang liang, wang liang, yan wang
you liang » you xian, you liangzhi
yang yang » wang yang, wang yan
chen boon » cheng boon, chor boon, chen john
boon hong » boon chong, boon siong
kong van » cong van, duong van, kong hang
a chen » ta chen, _ chen, n chen

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: qian ((((yan liang) OR (you liang))) OR (yang yang)) a chen boon hong kong van ;~.
• Adding a wildcard symbol may retrieve word variants: qian ((((yan liang) or (you liang))) or (yang yang)) a chen boon hong kong van ;*.