Perhaps you should try some spelling variations:
wang leading » wang leiping, change leading, making leading
human gene » human genome, human gender, human genetic
human bone » human bones, human body
hong paul » ron paul
yan wang » yuan wang, yang yang, qian wang
one half » only half
one hai » one chair

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: yan wang leading ((human gene) OR (human bone)) ((one hai) OR (one half)) hong paul ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yan wang leading ((human gene) OR (human bone)) ((one hai) or (one half)) hong paul ;~".
• Adding a wildcard symbol may retrieve word variants: yan wang leading ((human gene) OR (human bone)) ((one hai) or (one half)) hong paul ;*.