Perhaps you should try some spelling variations:
demands during » remarks during
water demands » water demand
zhang fang » zhang fan, zhang zhang, zhang yan
yuan water » human water, run water, can water
fang yuan » wang yuhan, wang yan, meng yuan
li zhang » _ zhang
bonn a » bonn am, bonn _, bonn 1
kon a » von a, won a, don a
bon a » von 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 zhang fang yuan water demands during ((kon a) OR (((bon a) OR (bonn a)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "li zhang fang yuan water demands during ((kon a) or (((bon a) OR (bonn a)))) ;~".
• Adding a wildcard symbol may retrieve word variants: li zhang fang yuan water demands during ((kon a) or (((bon a) OR (bonn a)))) ;*.