Perhaps you should try some spelling variations:
yi gender » i gender, ii gender, die gender
liang dan » liang tan, king dan, wang dan
liang sun » liang tan, wing sun
zheng wei » zhen wei, zheng lei, chen wei
zhang wei » zhen wei
wang yao » wang yan, yang yao, gang yao
yao yang » yang yang
yang yi » yang di, yang xi, yang jui

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 yao yang yi gender ((liang dan) OR (liang sun)) ((zheng wei) OR (zhang wei)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yao yang yi gender ((liang dan) OR (liang sun)) ((zheng wei) or (zhang wei)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yao yang yi gender ((liang dan) OR (liang sun)) ((zheng wei) or (zhang wei)) ;*.