Perhaps you should try some spelling variations:
cheng ton » chung tong, cheng han, chen tan
qian yan » qian jun, qian yi
yan wang » yuan wang, yang yang, qian wang
wang xia » fang xia, wang qiao, wang xuan
cong sun » cong shu, cong van
wing sun » liang sun, nina sun, wing ian
boon » book, boom, born
minh » mind, ming, mine

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: qian yan wang xia ((cheng ton) OR (cheng boon)) minh ((cong sun) OR (wing sun)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "qian yan wang xia ((cheng ton) or (cheng boon)) minh ((cong sun) OR (wing sun)) ;~".
• Adding a wildcard symbol may retrieve word variants: qian yan wang xia ((cheng ton) or (cheng boon)) minh ((cong sun) OR (wing sun)) ;*.