Perhaps you should try some spelling variations:
cheng yang » chen yang, cheng zhang, chen wang
yang john » young john, king john, yang jin
john song » john wong, john bonn, john ngosong
yu cheng » yu chen, _ cheng
yan tuan » yan guan, yan yuan, anh tuan
song sam » wong sam, kong sar, song pae
tuan yu » tian yu, tuan vu, than you
wang » wing

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang or lang) or wan) yan tuan yu cheng yang john song sam ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang OR lang) OR wan) yan tuan yu cheng yang john song sam ;.
• Adding a wildcard symbol may retrieve word variants: ((wang or lang) or wan) yan tuan yu cheng yang john song sam ;*.