Perhaps you should try some spelling variations:
orientation techniques » augmentation techniques, segmentation techniques, imputation techniques
floatation technique » inhalation technique, implantation technique, imputation techniques
two orientation » tool orientation, _ orientation, ebsd orientation
no2 floatation » _ floatation
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.

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