Perhaps you should try some spelling variations:
imputation techniques » implantation technique, augmentation techniques, segmentation techniques
infection technique » inhalation technique, reduction technique, reduction techniques
co infection » co infections, _ infection, 19 infection
based code » based anode
based co » based no2, based two, 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 code imputation techniques ) or ( learning-based co infection technique ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( learning-based code imputation techniques ) OR ( learning-based co infection technique )).
• Adding a wildcard symbol may retrieve word variants: (( learning-based code imputation techniques ) or ( learning-based co infection technique ))*.