Perhaps you should try some spelling variations:
information section » information collection, information education, information security
section methods » sections methods, section method, selection methods
array forming » array format, array arcing, array formats
array fermi » array format
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 section methods robust ((((array forming) or (array fermi))) or (array using))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information section methods robust ((((array forming) OR (array fermi))) OR (array using)).
• Adding a wildcard symbol may retrieve word variants: information section methods robust ((((array forming) or (array fermi))) or (array using))*.