Perhaps you should try some spelling variations:
based studies » case studies
based rudie » based ridge, based review, based audits
iii gender » ii gender, i gender, iii gene
young ghi » young choi, hong ghi, young get
yan yang » yang yang, yao yang, dan yang
tan yang » dan yang, tan ying, tan yong
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yan yang) or (tan yang)) iii gender ((based rudie) OR (based studies)) young ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan yang) OR (tan yang)) iii gender ((based rudie) OR (based studies)) young ghi ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yang) or (tan yang)) iii gender ((based rudie) OR (based studies)) young ghi ;*".