Perhaps you should try some spelling variations:
gender congo » gender change, gender codes, gender cops
tender congo » trade congo
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling
call date » call rates, all dates, call educate
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 congo) OR (tender congo)) call date sub ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang wang) OR (wang yang)) yidan e ((gender congo) OR (tender congo)) call date sub ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang wang) or (wang yang)) yidan e ((gender congo) OR (tender congo)) call date sub ;*".