Perhaps you should try some spelling variations:
positive discrimination » price discrimination, isotope discrimination, prejudice discrimination
discrimination methods » discretization methods, dissemination methods, discrimination ethics
array profiling » array processing, microarray profiling
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: positive discrimination methods tools ((((array string) or (array format))) or (array profiling))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: positive discrimination methods tools ((((array string) OR (array format))) OR (array profiling)).
• Adding a wildcard symbol may retrieve word variants: positive discrimination methods tools ((((array string) or (array format))) or (array profiling))*.