Perhaps you should try some spelling variations:
change leading » change learning, change dealing, change leader
gender change » gender age
gan guan » yan guan, quan guan, gui guan
fan guon » yan guan
3 gender » 2 gender
date sub » data sub, case sub, note sub
wang » wing, wan
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 OR lang) ((gan guan) OR (fan guon)) 3 gender change leading ((date sub) OR (der spur)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or lang) ((gan guan) OR (fan guon)) 3 gender change leading ((date sub) or (der spur)) ;~".
• Adding a wildcard symbol may retrieve word variants: (wang or lang) ((gan guan) OR (fan guon)) 3 gender change leading ((date sub) or (der spur)) ;*.