Perhaps you should try some spelling variations:
yang time » long time, yang jie, lag time
time lost » time cost, time loss, time list
thin lens » thin end
thin line » think like
yan yang » yang yang, yao yang, dan yang
wan yan » wang yan, nan yan, wai yan
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: wan yan yang time lost ((thin lens) OR (thin line)) dong sin ;~.
• Adding a wildcard symbol may retrieve word variants: wan yan yang time lost ((thin lens) or (thin line)) dong sin ;*.