Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
cost patients » cost patient, cleft patients, care patients
guang end » guang eu
risk cong » risk coping, risk among, risk along
wang hui » wang hua, wang zhi, wang wei
end cost » end close, land cost, end iot
wang wu » wang hua, wang wei, wang yue

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang wu) OR (wang hui)) guang end cost patients risk cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang wu) OR (wang hui)) guang end cost patients risk cong shu ;*".