Perhaps you should try some spelling variations:
gender machine » gender meshing, gender machineries
yang guang » yang yang, yan guan, yang liang
wang yang » wang yan, wang liang, wang yanling
z gender » 2 gender, 3 gender, 1 gender
note sub » note sur
date sub » data sub, case sub
guang z » guang zhe, guang eu
spur » sur

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 guang z gender machine learning ((((note sub) OR (date sub))) OR (der spur)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang guang z gender machine learning ((((note sub) OR (date sub))) or (der spur)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang guang z gender machine learning ((((note sub) OR (date sub))) or (der spur)) ;*.