Perhaps you should try some spelling variations:
boon chong » boon siong, joon chang
chong hsun » chang hsun, chung hsuan, chong suk
hsun cheng » su cheng
shang kai » shang hai
tan boon » tan soon, a boon, ar boon
yang jui » yang judy, yang di, yang xi
yang jin » yang jie, yang jun, ying jin
yang yi » yang di, yang xi

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 boon chong hsun cheng ((((yang jui) OR (yang jin))) OR (yang yi)) shang kai ;~.
• Adding a wildcard symbol may retrieve word variants: tan boon chong hsun cheng ((((yang jui) or (yang jin))) or (yang yi)) shang kai ;*.