Perhaps you should try some spelling variations:
risk securing » risk scoring, risk security, risk executing
securing food » security food, measuring food, securing land
ying chang » jin chang, yi chang, yin hang
ying wang » ping wang, ying yang, hong wang
food long » food loss
yang fan » zhang fan, yang dean, yang yang
fan risk » can risk, yan risk, main risk

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: ((ying wang) OR (ying chang)) yang fan risk securing food long (sar OR saur) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ying wang) OR (ying chang)) yang fan risk securing food long (sar or saur) ;~".
• Adding a wildcard symbol may retrieve word variants: ((ying wang) OR (ying chang)) yang fan risk securing food long (sar or saur) ;*.