Perhaps you should try some spelling variations:
estimation determination » estimators determination, titration determination, validation determination
determination methods » examination methods, detection methods
array formulas » area formulas, harrop formulas, array format
array probing » arrays probing, assay probing, array 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: estimation determination methods tools ((((array string) or (array formulas))) or (array probing))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: estimation determination methods tools ((((array string) OR (array formulas))) OR (array probing)).
• Adding a wildcard symbol may retrieve word variants: estimation determination methods tools ((((array string) or (array formulas))) or (array probing))*.