Perhaps you should try some spelling variations:
different observation » different observations, different conservation, different preservation
innovation functions » innervation function, innovation definitions, innovation conditions
functions different » functions difference, functions differential, cations different
array arcing » array forming, array probing, array sharing
array string » array strong, arrays strings, array sharing
array long » array along, arrays long, array strong

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

• Performing a fuzzy search may retrieve terms with similar spellings: innovation functions different observation ((((array long) or (array arcing))) or (array string))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: innovation functions different observation ((((array long) OR (array arcing))) OR (array string)).
• Adding a wildcard symbol may retrieve word variants: innovation functions different observation ((((array long) or (array arcing))) or (array string))*.