Perhaps you should try some spelling variations:
boon chang » boon chong, joon chang, hoong chang
chang jui » chang gui, yang jui, chang su
dang hari » dang hai
jui chen » yi chen
yang jie » yang jin, yang jui, yang jun
yang xi » yang jui
yang yi » yang jui
a boon » a book

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: a boon chang jui chen ((((((yang jie) OR (yang xi))) or (yang di))) or (yang yi)) dang hari ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: a boon chang jui chen ((((((yang jie) OR (yang xi))) OR (yang di))) OR (yang yi)) dang hari ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "a boon chang jui chen ((((((yang jie) OR (yang xi))) or (yang di))) or (yang yi)) dang hari ;*".