Perhaps you should try some spelling variations:
"learning-based k simulation techniques" » "learning-based k imputation techniques", "learning-based k segmentation techniques", "learning-based k inhalation technique", "learning-based _ simulation techniques", "learning-based a simulation techniques", "learning-based _ simulations techniques", "learning-based n simulation techniques", "learning-based 3d simulation techniques"
"learning-based a mitigation techniques" » "learning-based a imputation techniques", "learning-based _ mitigation techniques", "learning-based _ litigation techniques", "learning-based n mitigation techniques", "learning-based 3d mitigation techniques"

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