Perhaps you should try some spelling variations:
boon chong » boon siong, joon chang
chong you » chang you, thing you, chong yah
dang haji » dang hai, dato haji
wan boon » a boon, ar boon
you chen » you when, you chenli, you check
yang jie » yang jin, yang jui, yang xi
yang yi » yang xi, yang jui

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 boon chong you chen ((((yang jie) OR (yang di))) OR (yang yi)) dang haji ;~.
• Adding a wildcard symbol may retrieve word variants: wan boon chong you chen ((((yang jie) or (yang di))) or (yang yi)) dang haji ;*.