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