Perhaps you should try some spelling variations:
"learning-based novel implantation technique" » "learning-based novel floatation technique", "learning-based novel inhalation technique", "learning-based anodes implantation technique", "learning-based _ovel implantation technique", "learning-based kovel implantation technique", "learning-based no2ovel implantation technique"
"learning-based n imputation techniques" » "learning-based n augmentation techniques", "learning-based n segmentation techniques", "learning-based n floatation technique", "learning-based _ computation techniques", "learning-based _ reputation techniques", "learning-based _ imputation techniques", "learning-based k imputation techniques", "learning-based no2 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 n imputation techniques") or ("learning-based novel implantation technique"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based n imputation techniques") OR ("learning-based novel implantation technique"))*.
• Removing quotes may allow a broader search: (( learning-based n imputation techniques ) or ( learning-based novel implantation technique ))*.