Perhaps you should try some spelling variations:
pumping control » pacing control, using control, comparing control
savings pumping » savings using
control bi » control b, control 5, control 4
wang yang » wang liang, wang yanling
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) OR (wang yan)) fang ((ii cost) or (di costo)) savings pumping control bi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (wang yan)) fang ((ii cost) OR (di costo)) savings pumping control bi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) OR (wang yan)) fang ((ii cost) or (di costo)) savings pumping control bi ;".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) OR (wang yan)) fang ((ii cost) or (di costo)) savings pumping control bi ;*.