Perhaps you should try some spelling variations:
learning processes » learning process
two dimensional » three dimensional
array formulas » area formulas, harrop formulas, array formats
processes two » process two, processes tools, processes time
array forming » array arcing, array fermi, array formats

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

• Performing a fuzzy search may retrieve terms with similar spellings: learning processes two dimensional ((((array format) or (array formulas))) or (array forming))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: learning processes two dimensional ((((array format) OR (array formulas))) OR (array forming)).
• Adding a wildcard symbol may retrieve word variants: learning processes two dimensional ((((array format) or (array formulas))) or (array forming))*.