Perhaps you should try some spelling variations:
reduction techniques » reduction technique, imputation techniques
floatation technique » inhalation technique, implantation technique, imputation techniques
two floatation » _ floatation
3d reduction » _ reduction
based two » based tool, based co
based 3d » based _, based co, based k

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 two floatation technique ) or ( learning-based 3d reduction techniques ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( learning-based two floatation technique ) OR ( learning-based 3d reduction techniques )).
• Adding a wildcard symbol may retrieve word variants: (( learning-based two floatation technique ) or ( learning-based 3d reduction techniques ))*.