Perhaps you should try some spelling variations:
"learning-based anode segmentation techniques" » "learning-based anode augmentation techniques", "learning-based 3d segmentation techniques", "learning-based shape segmentation techniques", "learning-based code segmentation techniques"
"learning-based data imputation techniques" » "learning-based data implantation technique", "learning-based data augmentation techniques", "learning-based data floatation 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 anode segmentation techniques") or ("learning-based data imputation techniques"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based anode segmentation techniques") OR ("learning-based data imputation techniques")).
• Removing quotes may allow a broader search: (( learning-based anode segmentation techniques ) or ( learning-based data imputation techniques )).
• Adding a wildcard symbol may retrieve word variants: (("learning-based anode segmentation techniques") or ("learning-based data imputation techniques"))*.