Perhaps you should try some spelling variations:
"learning-based co augmentation techniques" » "learning-based co segmentation techniques", "learning-based co imputation techniques", "learning-based data augmentation techniques", "learning-based no2 augmentation techniques", "learning-based two augmentation techniques", "learning-based _ augmentation techniques"
"learning-based code implantation technique" » "learning-based code imputation techniques", "learning-based code floatation technique", "learning-based code inhalation technique", "learning-based novel implantation technique", "learning-based anode implantation technique", "learning-based no2de implantation technique", "learning-based twode implantation technique", "learning-based _de implantation technique"

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