Perhaps you should try some spelling variations:
simulation techniques » imputation techniques, segmentation techniques, inhalation technique
mitigation techniques » imputation techniques
3d simulation » _ simulation, a simulation, mri simulation
co mitigation » _ mitigation, _ litigation, co limitation
based 3d » based _, based k, based n
based co » based code, based no2, based two

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 simulation techniques ) OR ( learning-based co mitigation techniques ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( learning-based 3d simulation techniques ) OR ( learning-based co mitigation techniques ))".
• Adding a wildcard symbol may retrieve word variants: (( learning-based 3d simulation techniques ) OR ( learning-based co mitigation techniques ))*.