Perhaps you should try some spelling variations:
chin chang » china chang, chain change, china zhang
gang sung » gang und, gang gong, hung sung
chin fang » china wang, china yang, cai fang
vii chang » viii chang, ii chang, vii anhang
xia shang » xiao zhang, xia fang, jia zhang
shang hai » shang kai, dang hai, chang ha
sung yan » sun yan, wang yan, sung nak
yan xi » yang xi, yan zi

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: gang sung yan xi ((((chin chang) OR (chin fang))) OR (vii chang)) xia shang hai ;~.
• Adding a wildcard symbol may retrieve word variants: gang sung yan xi ((((chin chang) or (chin fang))) or (vii chang)) xia shang hai ;*.