Perhaps you should try some spelling variations:
fermentation process » fermentation processes, fermentation products, fermentation profiles
learning decision » learning design, planning decision, learning designs
process learning » problems learning, process planning, process mining
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing

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

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