Perhaps you should try some spelling variations:
limitation techniques » imputation techniques, mitigation techniques, augmentation techniques
simulation techniques » imputation techniques, mitigation techniques, segmentation techniques
closed simulation » based simulation
two limitation » co limitation, food limitation
based closed » based code, based cross
based two » based tool, based co

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