Perhaps you should try some spelling variations:
deformation estimation » information estimation, estimation estimation, deformation simulation
estimation system » automation system, animation system
array formulas » area formulas, harrop formulas, array format
system recent » systems recent, system revenue, system report
array string » array strong, arrays strings, array sharing
array using » arrays using

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

• Performing a fuzzy search may retrieve terms with similar spellings: deformation estimation system recent ((((array formulas) or (array string))) or (array using))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: deformation estimation system recent ((((array formulas) OR (array string))) OR (array using)).
• Adding a wildcard symbol may retrieve word variants: deformation estimation system recent ((((array formulas) or (array string))) or (array using))*.