Perhaps you should try some spelling variations:
yihan guan » yan guan
chang won » chang soon, chang ann, chang min
won keong » poh keong, hon kwong, kin keong
keong shu » cong shu, jeong su
yan yuan » yan guan, fang yuan, nan yan
yi chin » ii china, chi chin, yap chin
yi chen » jui chen

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: wan ((yan yuan) OR (yihan guan)) ((yi chin) OR (yi chen)) chang won keong shu ;~.
• Adding a wildcard symbol may retrieve word variants: wan ((yan yuan) or (yihan guan)) ((yi chin) or (yi chen)) chang won keong shu ;*.