Perhaps you should try some spelling variations:
during scoping » during stroking, during ramping, during tapping
cost learning » clt learning, ct learning, forest learning
past learning » waste learning, smart learning, first learning
scoping shu » scoping study
dong yang » dong hoang, wang yang, yang yang
ling di » ling li, ling dao

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: ((dong yang) OR (wang yan)) ling di ((cost learning) OR (past learning)) during scoping shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) or (wang yan)) ling di ((cost learning) OR (past learning)) during scoping shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (wang yan)) ling di ((cost learning) OR (past learning)) during scoping shu ;*.