Perhaps you should try some spelling variations:
indication techniques » imputation techniques, inhalation technique, mitigation techniques
floatation technique » inhalation technique, implantation technique, imputation techniques
anode indication » novel indication
co floatation » _ floatation
based anode » based code
based co » based code, based no2, based two

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