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 k implantation technique", "learning-based no2 implantation technique"
"learning-based n floatation technique" » "learning-based n inhalation technique", "learning-based n imputation techniques", "learning-based n truncation technique", "learning-based _ floatation technique", "learning-based k floatation technique", "learning-based no2 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 floatation technique") or ("learning-based n implantation technique"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based n floatation technique") OR ("learning-based n implantation technique")).
• Removing quotes may allow a broader search: (( learning-based n floatation technique ) or ( learning-based n implantation technique )).
• Adding a wildcard symbol may retrieve word variants: (("learning-based n floatation technique") or ("learning-based n implantation technique"))*.