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

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 no2 inhalation technique ) or ( learning-based two truncation technique ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( learning-based no2 inhalation technique ) OR ( learning-based two truncation technique )).
• Adding a wildcard symbol may retrieve word variants: (( learning-based no2 inhalation technique ) or ( learning-based two truncation technique ))*.