Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
wang yang » wang yan, wang liang, wang yanling
shang hai » shang kai, dang hai, chang ha
lang yan » wang yan, zhang yan, yang yang
chai tan » chai tam, chai onn
tan sang » tan yang, tang tang, tan hong
ka chai » ka chuan, kim chai
hong » long

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: ((lang yan) OR (wang yang)) ka chai tan sang minh ((shang hai) OR (hong tan)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang yan) OR (wang yang)) ka chai tan sang minh ((shang hai) or (hong tan)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((lang yan) OR (wang yang)) ka chai tan sang minh ((shang hai) or (hong tan)) ;*.