Perhaps you should try some spelling variations:
lost ratings » load ratings, lost earnings, bond ratings
ratings risk » patients risk
wang wang » wang yang, wang liang, wang yan
yang yang » wang yang, wang yan
among who » along who, among hr, wrong who
yang can » yang fan, yang jin, yang jun

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

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