Perhaps you should try some spelling variations:
zhang yan » zhang fan, zhang jian, wang yan
chih hang » chin chang, shih huang, chih yung
hang cong » dang cuong, thang long, zhang hong
chong shu » cong shu
chong suk » chong yun, cong sun, yong suk
wing sun » liang sun, cong sun, nina sun
yan gan » yan guan, yan clan, yan wang
li chih » lin chih, hai chih

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: zhang yan gan li chih hang cong ((chong shu) OR (((chong suk) OR (wing sun)))) ;~.
• Adding a wildcard symbol may retrieve word variants: zhang yan gan li chih hang cong ((chong shu) or (((chong suk) or (wing sun)))) ;*.