Perhaps you should try some spelling variations:
china's water » china's wto, china's state
dann china's » dan china's, can china's, dragon china's
water saving » water savings, water sharing, water heating
saving using » savings using, carving using, sensing using
dann bin » dong bin
tong hui » wang hui
dong di » dong sin

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: ((dann bin) OR (dong di)) dann china's water saving using ((wang hua) OR (tong hui)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((dann bin) or (dong di)) dann china's water saving using ((wang hua) or (tong hui)) ;*.