Perhaps you should try some spelling variations:
imputation techniques » implantation technique, augmentation techniques, segmentation techniques
floatation technique » inhalation technique, implantation technique, truncation technique
mil floatation » _ floatation
based tool » based two
based mil » based gel

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