Perhaps you should try some spelling variations:
care patients » cancer patients, failure patients
cost patients » cost patient, cleft patients, des patients
among shui » among sri, tong shui
wang yang » wang yan, wang liang, wang yanling
yang jun » yang jui, pang jun, yang jin
yang up » yang jui, tying up, hang ups

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

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