Perhaps you should try some spelling variations:
china chung » china chang, china china, china chen
chung chun » chung chuan, chung chong, chung chi
han china » hang china, than china, can china
shang hai » shang kai, dang hai, chang ha
chun hui » chuang hui, china hui, chun h
wan yan » wang yan, wai yan, wang yang
nan yan » nan ya, wang yan, qian yan

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) OR (nan yan)) han china chung chun hui ((shang hai) OR ((hong OR long) tan)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan yan) OR (nan yan)) han china chung chun hui ((shang hai) or ((hong or long) tan)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wan yan) OR (nan yan)) han china chung chun hui ((shang hai) or ((hong or long) tan)) ;*.