Perhaps you should try some spelling variations:
first thin » first thing, first things, first third
rong yang » dong yang, wang yang, yang yang
thin lens » thin line, thin end
2d first » 2 first, 28 first, 3d first
dort bin » dong bin, dort ii, dort von
dort hin » dort ii, dort von
yang 2d » yang d
dong di » dong sin
org bin » dong bin
qian » ian, kian, jian

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "qian rong yang 2d first thin lens ((((dong di) OR (((org bin) OR (dort bin))))) OR (dort hin)) ;~".
• Adding a wildcard symbol may retrieve word variants: qian rong yang 2d first thin lens ((((dong di) OR (((org bin) OR (dort bin))))) OR (dort hin)) ;*.