Perhaps you should try some spelling variations:
demand during » demands during, poland during, demand making
water demand » labor demand
thang long » change long
li thang » li zhang, li gang, li qiang
von a » von h, von f, von r
von i » von h
bon a » bonn a, ben a, box a

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: li thang long run water demand during ((((von a) OR (von i))) OR (bon a)) ;~.
• Adding a wildcard symbol may retrieve word variants: li thang long run water demand during ((((von a) or (von i))) or (bon a)) ;*.