Perhaps you should try some spelling variations:
among letters » among lecturers, among learners, among masters
manage risk » managing risk
change risk » change risks, exchange risk
wang liang » wang yang
liang yang » liang ying, wang yang, yang yang
range risk » change risks
can close » can lose, a close, can cause
yang can » yang fan, yang dean, yang yang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang liang yang can close ((((range risk) OR (change risk))) or (manage risk)) among letters ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang yang can close ((((range risk) OR (change risk))) OR (manage risk)) among letters ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang yang can close ((((range risk) OR (change risk))) or (manage risk)) among letters ;*".