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