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