Perhaps you should try some spelling variations:
demands during » remarks during
water demands » water demand
zhang wang » zhang fang, zhang zhang, zhang fan
yan water » can water, man water, main water
li zhang » _ zhang
kon a » von a, won a, don a
bon a » bonn a, von a, ben 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 zhang wang yan water demands during ((kon a) OR (bon a)) ;~.
• Adding a wildcard symbol may retrieve word variants: li zhang wang yan water demands during ((kon a) or (bon a)) ;*.