Perhaps you should try some spelling variations:
imputation techniques » implantation technique, augmentation techniques, segmentation techniques
indication techniques » inhalation technique, mitigation techniques, reduction techniques
code indication » novel indication
n imputation » _ computation, _ reputation
based code » based anode
based n » based _, based k, based no2

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 n imputation techniques ) OR ( learning-based code indication techniques ))~.
• Adding a wildcard symbol may retrieve word variants: (( learning-based n imputation techniques ) or ( learning-based code indication techniques ))*.