Perhaps you should try some spelling variations:
"learning-based code implantation technique" » "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"
"learning-based co imputation techniques" » "learning-based co augmentation techniques", "learning-based co segmentation techniques", "learning-based co floatation technique", "learning-based co limitation techniques", "learning-based no2 imputation techniques", "learning-based two imputation techniques", "learning-based _ 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 co imputation techniques\") OR (\"learning-based code implantation technique\"))~".
• Removing quotes may allow a broader search: (( learning-based co imputation techniques ) OR ( learning-based code implantation technique ))~.
• Adding a wildcard symbol may retrieve word variants: (("learning-based co imputation techniques") OR ("learning-based code implantation technique"))*.