Perhaps you should try some spelling variations:
first sampling » field sampling, first saving, light sampling
sampling using » sampling during, sampling testing, sampling units
mali first » ai first
ping wang » ping pong, hong wang
wang yang » wang yan, wang liang, wang yanling
yang mali » yang dali, yang all, yang li
dong skin » dof skin
dong bin » dong di, dann bin

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ping wang yang mali first sampling using ((((dong bin) or (dong sin))) or (dong skin)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ping wang yang mali first sampling using ((((dong bin) OR (dong sin))) OR (dong skin)) ;*.