Perhaps you should try some spelling variations:
augmentation techniques » segmentation techniques, imputation techniques
implantation technique » imputation techniques, floatation technique, inhalation technique
no2 implantation » novel implantation
gas sensor » gas sensors
based no2 » based co, based n

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( learning-gas sensor augmentation techniques ) or ( learning-based no2 implantation technique ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( learning-gas sensor augmentation techniques ) OR ( learning-based no2 implantation technique )).
• Adding a wildcard symbol may retrieve word variants: (( learning-gas sensor augmentation techniques ) or ( learning-based no2 implantation technique ))*.