Perhaps you should try some spelling variations:
augmentation techniques » segmentation techniques, imputation techniques
reduction technique » reduction techniques, truncation technique
co augmentation » data augmentation
no2 reduction » h2o2 reduction, _ reduction
based no2 » based n
based co » based code, based two, based _

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