Perhaps you should try some spelling variations:
yiqian wang » yijiang wang, liqin wang, qian wang
than change » chain change, can change, mean change
shi zhang » xi zhang
chin fang » chin chang, china wang, china yang
yan jiao » gan jiao, ben jiao, ren jiao
li zhang » _ zhang
sheng » cheng, zheng

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((yiqian wang) or (than change)) yan jiao ((shi zhang) OR (li zhang)) chin fang sheng ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yiqian wang) OR (than change)) yan jiao ((shi zhang) OR (li zhang)) chin fang sheng ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yiqian wang) or (than change)) yan jiao ((shi zhang) OR (li zhang)) chin fang sheng ;*".