Perhaps you should try some spelling variations:
information weak » information leak, information leaks, information work
teaching design » teaching foreign
array formulas » area formulas, harrop formulas, array formats
weak teaching » weak searching, team teaching, work teaching
array string » array strong, arrays strings, 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: information weak teaching design ((((array string) or (array formulas))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information weak teaching design ((((array string) OR (array formulas))) OR (array format)).
• Adding a wildcard symbol may retrieve word variants: information weak teaching design ((((array string) or (array formulas))) or (array format))*.