Perhaps you should try some spelling variations:
wang liang » wang yang
one case » some case, one class, one phase
yan guan » gan guan, yan yuan, yang guang
yang jin » yang jie, yang jun, ying jin
yang xi » yang yi, yang jui
case d » case 1, case 2, case 3
d big » do big, _ big, a big

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: one case d big we ((((wang liang) OR (yan guan))) OR (yang jin)) ((yang xi) OR (yang di)) ;~.
• Adding a wildcard symbol may retrieve word variants: one case d big we ((((wang liang) or (yan guan))) or (yang jin)) ((yang xi) or (yang di)) ;*.