Perhaps you should try some spelling variations:
"learning-based k imputation techniques" » "learning-based k implantation technique", "learning-based k augmentation techniques", "learning-based k segmentation techniques", "learning-based _ computation techniques", "learning-based _ reputation techniques", "learning-based _ imputation techniques", "learning-based n imputation techniques", "learning-based co imputation techniques"
"learning-based 3d imputation techniques" » "learning-based 3d implantation technique", "learning-based 3d augmentation techniques", "learning-based 3d segmentation techniques", "learning-based 3d simulation techniques", "learning-based _ imputation techniques", "learning-based co imputation techniques", "learning-based n imputation techniques"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"learning-based k imputation techniques\") OR (\"learning-based 3d imputation techniques\"))~".
• Removing quotes may allow a broader search: (( learning-based k imputation techniques ) OR ( learning-based 3d imputation techniques ))~.
• Adding a wildcard symbol may retrieve word variants: (("learning-based k imputation techniques") OR ("learning-based 3d imputation techniques"))*.