Perhaps you should try some spelling variations:
wang liang » wang yang
sang minh » kang minah, anh minh, song min
shang hai » shang kai, dang hai, hong hai
liang ka » liang dan, liang tan, jiang ke
chai tan » chai tam, chai onn
tan sang » tan yang, tang tang, tan hong
chang ha » chang mae
ka chai » ka chuan, kim chai

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 ka chai tan sang minh ((shang hai) OR (chang ha)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang liang ka chai tan sang minh ((shang hai) or (chang ha)) ;*.