Perhaps you should try some spelling variations:
"learning-based co implantation technique" » "learning-based co imputation techniques", "learning-based co inhalation technique", "learning-based novel implantation technique", "learning-based code implantation technique", "learning-based no2 implantation technique", "learning-based two implantation technique"
"learning-based co floatation technique" » "learning-based co inhalation technique", "learning-based co imputation techniques", "learning-based co truncation technique", "learning-based _ floatation technique", "learning-based code floatation technique", "learning-based no2 floatation technique", "learning-based two floatation technique"

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