Perhaps you should try some spelling variations:
"learning-based nnode augmentation techniques" » "learning-based nnode segmentation techniques", "learning-based nnode imputation techniques", "learning-based image augmentation techniques", "learning-based anode augmentation techniques", "learning-based anodes augmentation techniques", "learning-based code augmentation techniques", "learning-based _node augmentation techniques", "learning-based knode augmentation techniques", "learning-based no2node augmentation techniques"
"learning-based n simulation technique" » "learning-based n imputation techniques", "learning-based n inhalation technique", "learning-based n implantation technique", "learning-based _ simulation technique", "learning-based a simulation technique", "learning-based _ simulations technique", "learning-based k simulation technique", "learning-based no2 simulation 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 n simulation technique") or ("learning-based nnode augmentation techniques"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based n simulation technique") OR ("learning-based nnode augmentation techniques"))*.
• Removing quotes may allow a broader search: (( learning-based n simulation technique ) or ( learning-based nnode augmentation techniques ))*.