Perhaps you should try some spelling variations:
savings using » mappings using, settings using, things using
using control » losing control, dosing control, pumping control
yang guang » yan guan, yang liang
control bi » control b, control 5, control 4
yang yang » wang yang, wang yan
di costo » del costo, di cristo, da costa
ii cost » ii cos, ii cross

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yang guang) OR (yang yang)) ((ii cost) or (di costo)) savings using control bi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yang guang) OR (yang yang)) ((ii cost) OR (di costo)) savings using control bi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang guang) OR (yang yang)) ((ii cost) or (di costo)) savings using control bi ;".
• Adding a wildcard symbol may retrieve word variants: wang ((yang guang) OR (yang yang)) ((ii cost) or (di costo)) savings using control bi ;*.