Perhaps you should try some spelling variations:
student expression » student aggression, htert expression, stress expression
information gap » information guide
array forming » array format, array arcing, array fermi
array string » array strong, arrays strings, array sharing
gap student » yap students, can student, bad student
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: information gap student expression ((array string) OR (((array forming) OR (array using))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information gap student expression ((array string) OR (((array forming) OR (array using))))".
• Adding a wildcard symbol may retrieve word variants: information gap student expression ((array string) OR (((array forming) OR (array using))))*.