Perhaps you should try some spelling variations:
trade control » train control, state control, price control
trade congo » trade hong, trade cargo
wang yang » wang yan, wang liang, wang yanling
yang fan » zhang fan, yang dean, yang yang
can one » than one, can only
fan a » fang a, can a, fan _
saur » sur, spur

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 yang fan a ((tender congo) OR (((trade congo) OR (trade control)))) can one saur ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang fan a ((tender congo) or (((trade congo) OR (trade control)))) can one saur ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang fan a ((tender congo) or (((trade congo) OR (trade control)))) can one saur ;*.