Perhaps you should try some spelling variations:
"learning-based two segmentation techniques" » "learning-based two augmentation techniques", "learning-based two imputation techniques", "learning-based 3d segmentation techniques", "learning-based tool segmentation techniques"
"learning-based co implantation technique" » "learning-based co imputation techniques", "learning-based co floatation technique", "learning-based co inhalation technique", "learning-based novel implantation technique", "learning-based code implantation technique", "learning-based no2 implantation technique", "learning-based _ implantation 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 co implantation technique") or ("learning-based two segmentation techniques"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based co implantation technique") OR ("learning-based two segmentation techniques"))*.
• Removing quotes may allow a broader search: (( learning-based co implantation technique ) or ( learning-based two segmentation techniques ))*.