Perhaps you should try some spelling variations:
change mali » exchange mali, change small, change may
change maps » change may, change makers, change macro
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling
e gender » 2 gender, 3 gender, 1 gender
date sub » data sub, case sub, note sub

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) or (wang yang)) yidan e gender ((change mali) OR (change maps)) date sub ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang wang) OR (wang yang)) yidan e gender ((change mali) OR (change maps)) date sub ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang wang) or (wang yang)) yidan e gender ((change mali) OR (change maps)) date sub ;*".