Perhaps you should try some spelling variations:
traction separation » extraction separation, fraction preparation, creation separation
separation methods » evaluation methods, education methods
methods survey » methods sources, methods series
array sharing » arrays bearing, array imaging, way sharing
array string » array strong, arrays strings, array forming

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

• Performing a fuzzy search may retrieve terms with similar spellings: traction separation methods survey ((((array string) or (array format))) or (array sharing))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: traction separation methods survey ((((array string) OR (array format))) OR (array sharing)).
• Adding a wildcard symbol may retrieve word variants: traction separation methods survey ((((array string) or (array format))) or (array sharing))*.