Perhaps you should try some spelling variations:
change john » changed john, chasse john, change japan
wang liang » wang yang
liang dan » liang tan, king dan, liang sun
khan syed » ahsan syed, shah syed, khan sher
chang won » chang soon, chang ann, chang min
wong yue » wang yue, hong yu
han en » han men, van en, chan eng

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: wang liang dan ((han en) OR (khan syed)) ((chang won) OR (change john)) wong yue ;~.
• Adding a wildcard symbol may retrieve word variants: wang liang dan ((han en) or (khan syed)) ((chang won) or (change john)) wong yue ;*.