Perhaps you should try some spelling variations:
estimation detection » estimation detecting, respiration detection, activation detection
detection methods » detection method, extraction methods, collection methods
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing
array fermi » array forming, array format

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

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