Perhaps you should try some spelling variations:
david mant » david ian, david ma, david malone
reform 2.1 » reform 3.1, reform 4.1, reform 2.2
qian wang » yiqian wang, qian rong, qian yan
yang zili » yang dali, yang li
2.1 david » 2017 david, 2 david, 210 david
yan wang » yuan wang, yang yang, yan liang
mant hai » dang hai
yang xi » yang di, yang yi, 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: ((yan wang) OR (qian wang)) ((yang zili) OR (yang xi)) reform 2.1 david mant hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yan wang) OR (qian wang)) ((yang zili) or (yang xi)) reform 2.1 david mant hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((yan wang) OR (qian wang)) ((yang zili) or (yang xi)) reform 2.1 david mant hai ;*.