Perhaps you should try some spelling variations:
saving using » savings using, carving using, sensing using
rates saving » water saving, rates during, rates using
dose rates » dose rate, des rates
yang guang » yang yang, yang liang
yan guan » gan guan, yan yuan, yihan guan
dong hoi » wong hoi, jong ho, dong di

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: wang ((yang guang) OR (yan guan)) dose rates saving using ((dong sin) OR (dong hoi)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((yang guang) or (yan guan)) dose rates saving using ((dong sin) or (dong hoi)) ;*.