Perhaps you should try some spelling variations:
light sampling » light damping, first sampling, ghg sampling
sampling units » sampling sites
twinn ian » wing ian
ian yang » dan yang, tan yang, wang yang
dann bin » dong bin
a light » _ light
yang a » yang ka, yang _, yang 8
sin » sign, sind, skin

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: twinn ian yang a light sampling units ((((dann bin) OR (dong di))) OR (dong sin)) ;~.
• Adding a wildcard symbol may retrieve word variants: twinn ian yang a light sampling units ((((dann bin) or (dong di))) or (dong sin)) ;*.