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"

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