Perhaps you should try some spelling variations:
limitation techniques » mitigation techniques, augmentation techniques, segmentation techniques
imputation techniques » implantation technique, augmentation techniques, segmentation techniques
food limitation » co limitation
n imputation » _ computation, _ reputation
based food » based tool
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 food limitation techniques ) OR ( learning-based n imputation techniques ))~.
• Adding a wildcard symbol may retrieve word variants: (( learning-based food limitation techniques ) or ( learning-based n imputation techniques ))*.