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

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 during scoping shu ;~.
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (wang yan)) ling di cost learning during scoping shu ;*.