Perhaps you should try some spelling variations:
"learning-based n implantation technique" » "learning-based n imputation techniques", "learning-based n inhalation technique", "learning-based novel implantation technique", "learning-based _ implementation technique", "learning-based _ implantation technique", "learning-based no2 implantation technique", "learning-based 3d implantation technique"
"learning-based k floatation technique" » "learning-based k inhalation technique", "learning-based k imputation techniques", "learning-based k truncation technique", "learning-based _ floatation technique", "learning-based 3d floatation technique", "learning-based co floatation 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 n implantation technique") OR ("learning-based k floatation technique"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"learning-based n implantation technique\") OR (\"learning-based k floatation technique\"))".
• Removing quotes may allow a broader search: (( learning-based n implantation technique ) OR ( learning-based k floatation technique )).
• Adding a wildcard symbol may retrieve word variants: (("learning-based n implantation technique") OR ("learning-based k floatation technique"))*.