Perhaps you should try some spelling variations:
securing food » security food, measuring food, securing land
sharing covid » during covid, sharing food, sharing hold
chang yun » chong yun, chang hsun, chae yun
data loss » data logs, data cross, data lod
yi chang » ii chang, ying chang, jin chang
yun data » noun data, turn data, own data

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: yi chang yun data loss ((securing food) OR (sharing covid)) kong (sar OR saur) ;~.
• Adding a wildcard symbol may retrieve word variants: yi chang yun data loss ((securing food) or (sharing covid)) kong (sar or saur) ;*.