Perhaps you should try some spelling variations:
optimization machine » optimization maximize, optimization package, optimization scheme
machine developing » teaching developing, acting developing, china developing
solving problems » solvency problems
housing problems » housing programs, housing projects, housing project
prices » price

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

• Performing a fuzzy search may retrieve terms with similar spellings: optimization machine developing ((solving problems) or (((housing problems) OR (housing prices)))).~.
• If you are trying to use Boolean operators, they must be ALL CAPS: optimization machine developing ((solving problems) OR (((housing problems) OR (housing prices))))..
• The words AND, OR and NOT may confuse the search; try adding quotes: "optimization machine developing ((solving problems) or (((housing problems) OR (housing prices)))).".
• Adding a wildcard symbol may retrieve word variants: optimization machine developing ((solving problems) or (((housing problems) OR (housing prices)))).*.