Perhaps you should try some spelling variations:
simulation techniques » imputation techniques, mitigation techniques, segmentation techniques
reduction techniques » reduction technique, imputation techniques
k simulation » _ simulation, a simulation, _ simulations
a reduction » _ reduction, a prediction, drag reduction
based a » based _, based n, based 3d
based k » based _, based n, based 3d

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