Perhaps you should try some spelling variations:
gender wage » gender based
yang liang » wang liang, yan liang, yang yang
gender age » under age, gender a, gender amp
wang yang » wang yan, wang liang, wang yanling
liang sun » liang dan, liang tan, wing sun
date sub » data sub, case sub, note sub
die spur » der spur

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang liang sun ((gender age) OR (gender wage)) latin ((date sub) OR (die spur)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang liang sun ((gender age) OR (gender wage)) latin ((date sub) or (die spur)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang liang sun ((gender age) OR (gender wage)) latin ((date sub) or (die spur)) ;*.