Perhaps you should try some spelling variations:
augmentation techniques » segmentation techniques, imputation techniques
simulation techniques » imputation techniques, mitigation techniques, segmentation techniques
3d augmentation » 3d segmentation, data augmentation
no2 simulation » _ simulation, a simulation, 3d simulation
based no2 » based co, based n
based 3d » based _, based co, based k

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 3d augmentation techniques ) or ( learning-based no2 simulation techniques ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( learning-based 3d augmentation techniques ) OR ( learning-based no2 simulation techniques )).
• Adding a wildcard symbol may retrieve word variants: (( learning-based 3d augmentation techniques ) or ( learning-based no2 simulation techniques ))*.