Perhaps you should try some spelling variations:
"learning-based no2de implantation technique" » "learning-based no2de floatation technique", "learning-based no2de inhalation technique", "learning-based novel implantation technique", "learning-based anode implantation technique", "learning-based code implantation technique", "learning-based no2 implantation technique"
"learning-based mri imputation techniques" » "learning-based mri augmentation techniques", "learning-based mri segmentation techniques", "learning-based mri floatation technique", "learning-based mri simulation techniques", "learning-based mil imputation techniques"

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 mri imputation techniques") or ("learning-based no2de implantation technique"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based mri imputation techniques") OR ("learning-based no2de implantation technique")).
• Removing quotes may allow a broader search: (( learning-based mri imputation techniques ) or ( learning-based no2de implantation technique )).
• Adding a wildcard symbol may retrieve word variants: (("learning-based mri imputation techniques") or ("learning-based no2de implantation technique"))*.