Perhaps you should try some spelling variations:
reduction techniques » reduction technique, imputation techniques
inhalation technique » floatation technique, implantation technique, imputation techniques
co inhalation » _ inhalation
two reduction » h2o2 reduction, _ reduction
based two » based tool
based co » based code, based no2, based _

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