Perhaps you should try some spelling variations:
visualization competency » visualization computer, visualization computing, socialization competency
competency questions » competency functions, competency testing, competency dimensions
array forming » array format, array arcing, array fermi
array string » array strong, arrays strings, array sharing

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

• If you are trying to use Boolean operators, they must be ALL CAPS: information visualization competency questions ((array forming) OR (array string))~.
• Adding a wildcard symbol may retrieve word variants: information visualization competency questions ((array forming) or (array string))*.