Perhaps you should try some spelling variations:
functions differential » functional differential, fractional differential, equations differential
innovation functions » innervation function, innovation definitions, innovation conditions
differential designs » differential design, different designs, different design
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: innovation functions differential designs ((array string) or (((array using) or (array format))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: innovation functions differential designs ((array string) OR (((array using) OR (array format)))).
• Adding a wildcard symbol may retrieve word variants: innovation functions differential designs ((array string) or (((array using) or (array format))))*.