Perhaps you should try some spelling variations:
segmentation techniques » augmentation techniques, imputation techniques
reduction techniques » reduction technique, imputation techniques
image segmentation » image augmentation, shape segmentation
n reduction » _ reduction, _ prediction, _ production
based n » based _, based k, based no2

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( learning-based n reduction techniques ) or ( learning-based image segmentation techniques ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( learning-based n reduction techniques ) OR ( learning-based image segmentation techniques )).
• Adding a wildcard symbol may retrieve word variants: (( learning-based n reduction techniques ) or ( learning-based image segmentation techniques ))*.