Perhaps you should try some spelling variations:
savings rate » savings rates
lower cost » lower costs, power costs, low cost
rate bring » rate beings, rate using, rates during
bring what » doing what, brief what, going what
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling
oder cost » der cost, power cost, user cost

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wang yang ((oder cost) OR (lower cost)) savings rate bring what ;~".
• Adding a wildcard symbol may retrieve word variants: wang wang yang ((oder cost) OR (lower cost)) savings rate bring what ;*.