Perhaps you should try some spelling variations:
sampling weighting » sampling weights, sampling testing
first sampling » field sampling, first saving, light sampling
daun yang » dan yang, du yang, tan yang
wan daun » wan daud
ai first » i first, ii first, mali first
dong bin » dong sin, dann bin
yang ai » yang di, yang xi, yang yi
dong di » dong sin
sind » find, wind, kind

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: wan daun yang ai first sampling weighting ((((dong bin) OR (dong di))) OR (dong (sin OR sind))) ;~.
• Adding a wildcard symbol may retrieve word variants: wan daun yang ai first sampling weighting ((((dong bin) or (dong di))) or (dong (sin or sind))) ;*.