Perhaps you should try some spelling variations:
boon chong » boon siong, joon chang
chong yulu » chen yulu, chong yun
yulu chen » yu chen
dang hari » dang hai
yang jun » pang jun, yang judy, yang fan
yang jin » yang jie, ying jin, shang jin
yang jui » yang judy, yang xi, yang yi
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 chong yulu chen ((((yang jun) OR (yang jin))) or (((yang di) or (yang jui)))) dang hari ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: a boon chong yulu chen ((((yang jun) OR (yang jin))) OR (((yang di) OR (yang jui)))) dang hari ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "a boon chong yulu chen ((((yang jun) OR (yang jin))) or (((yang di) or (yang jui)))) dang hari ;*".