Perhaps you should try some spelling variations:
"learning-based a mitigation techniques" » "learning-based a imputation techniques", "learning-based _ mitigation techniques", "learning-based _ litigation techniques", "learning-based k mitigation techniques", "learning-based 3d mitigation techniques"
"learning-based n simulation techniques" » "learning-based n imputation techniques", "learning-based n segmentation techniques", "learning-based n inhalation technique", "learning-based _ simulation techniques", "learning-based a simulation techniques", "learning-based _ simulations techniques", "learning-based k simulation techniques", "learning-based no2 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 a mitigation techniques") or ("learning-based n simulation techniques"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based a mitigation techniques") OR ("learning-based n simulation techniques")).
• Removing quotes may allow a broader search: (( learning-based a mitigation techniques ) or ( learning-based n simulation techniques )).
• Adding a wildcard symbol may retrieve word variants: (("learning-based a mitigation techniques") or ("learning-based n simulation techniques"))*.