Perhaps you should try some spelling variations:
"learning-based k augmentation techniques" » "learning-based k segmentation techniques", "learning-based data augmentation techniques", "learning-based _ augmentation techniques", "learning-based n augmentation techniques", "learning-based 3d augmentation techniques"
"learning-based k imputation techniques" » "learning-based k implantation technique", "learning-based k segmentation techniques", "learning-based k floatation technique", "learning-based _ computation techniques", "learning-based _ reputation techniques", "learning-based _ imputation techniques", "learning-based n imputation techniques", "learning-based 3d 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 k imputation techniques") or ("learning-based k augmentation techniques"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based k imputation techniques") OR ("learning-based k augmentation techniques"))*.
• Removing quotes may allow a broader search: (( learning-based k imputation techniques ) or ( learning-based k augmentation techniques ))*.