Perhaps you should try some spelling variations:
segmentation techniques » augmentation techniques, imputation techniques
reduction techniques » reduction technique, imputation techniques
two segmentation » 3d segmentation
no2 reduction » h2o2 reduction, _ reduction
based no2 » based co, based n
based two » based tool, based co

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 no2 reduction techniques ) or ( learning-based two segmentation techniques ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( learning-based no2 reduction techniques ) OR ( learning-based two segmentation techniques )).
• Adding a wildcard symbol may retrieve word variants: (( learning-based no2 reduction techniques ) or ( learning-based two segmentation techniques ))*.