Perhaps you should try some spelling variations:
zhang ying » zhang ming, zhang ping, zhang ting
zhang jing » zhang ming, zhang jin, zhang ping
zheng qian » zheng quan, zhang qin, zheng xuan
zheng alan » zheng quan, zheng xuan
boon chong » boon siong, joon chang
yan boon » a boon, ar boon
chong ha » chang ha, chong nam, chong wan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((zhang ying) OR (zhang jing)) tang ((zheng qian) or (zheng alan)) yan boon chong ha ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((zhang ying) OR (zhang jing)) tang ((zheng qian) OR (zheng alan)) yan boon chong ha ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((zhang ying) OR (zhang jing)) tang ((zheng qian) or (zheng alan)) yan boon chong ha ;*".