Perhaps you should try some spelling variations:
among letters » among lecturers, among learners, among masters
losses manage » losses image
among parents » among patients, among ports
lose manage » class manage
wang liang » wang yang
liang yang » liang ying, wang yang, yang yang
yang fan » zhang fan, yang dean, yang yang

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: wang liang yang fan ((lose manage) OR (losses manage)) risk ((among letters) OR (among parents)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang yang fan ((lose manage) OR (losses manage)) risk ((among letters) or (among parents)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang liang yang fan ((lose manage) OR (losses manage)) risk ((among letters) or (among parents)) ;*.