Perhaps you should try some spelling variations:
"learning-based mri simulation techniques" » "learning-based mri imputation techniques", "learning-based mri mitigation techniques", "learning-based mri segmentation techniques", "learning-based _ simulation techniques", "learning-based a simulation techniques", "learning-based 3d simulation techniques", "learning-based mil simulation 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"

Try widening your search to All Fields.

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 mri simulation techniques") or ("learning-based code truncation technique"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("learning-based mri simulation techniques") OR ("learning-based code truncation technique")).
• Removing quotes may allow a broader search: (( learning-based mri simulation techniques ) or ( learning-based code truncation technique )).
• Adding a wildcard symbol may retrieve word variants: (("learning-based mri simulation techniques") or ("learning-based code truncation technique"))*.