Perhaps you should try some spelling variations:
"learning-based a segmentation techniques" » "learning-based a augmentation techniques", "learning-based a imputation techniques", "learning-based 3d segmentation techniques", "learning-based shape segmentation techniques", "learning-based _ segmentation techniques", "learning-based k segmentation techniques"
"learning-based n floatation technique" » "learning-based n inhalation technique", "learning-based n implantation technique", "learning-based n imputation techniques", "learning-based _ floatation technique", "learning-based k floatation technique", "learning-based no2 floatation technique"

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