Perhaps you should try some spelling variations:
boon chong » boon siong, joon chang
chong hsu » chang hsun, ching hsi, chong suk
hsu chin » hsu bin, hsu shi
yang jun » yang jui, pang jun, yang jin
yang xi » yang jui
yang yi » yang jui
a boon » a book
hai » hadi, haji, hari

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: a boon chong hsu chin ((((((yang xi) OR (yang jun))) OR (yang di))) OR (yang yi)) dang hai ;~.
• Adding a wildcard symbol may retrieve word variants: a boon chong hsu chin ((((((yang xi) or (yang jun))) or (yang di))) or (yang yi)) dang hai ;*.