Perhaps you should try some spelling variations:
"learning-based co segmentation techniques" » "learning-based co imputation techniques", "learning-based 3d segmentation techniques", "learning-based no2 segmentation techniques", "learning-based two segmentation techniques", "learning-based _ segmentation techniques"
"learning-based code augmentation techniques" » "learning-based code imputation techniques", "learning-based image augmentation techniques", "learning-based data augmentation techniques", "learning-based anode augmentation techniques", "learning-based no2de augmentation techniques", "learning-based twode augmentation techniques", "learning-based _de augmentation 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 co segmentation techniques") or ("learning-based code augmentation techniques"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based co segmentation techniques") OR ("learning-based code augmentation techniques"))*.
• Removing quotes may allow a broader search: (( learning-based co segmentation techniques ) or ( learning-based code augmentation techniques ))*.