Perhaps you should try some spelling variations:
mitigation techniques » imputation techniques
reduction technique » reduction techniques, truncation technique
closed reduction » model reduction
k mitigation » _ mitigation, _ litigation
based closed » based code, based cross
based k » based _, based n, based 3d

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