Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
passive optimization » bayesian optimization, game optimization, policy optimization
modified passive » modified adaptive
code nursing » code using, care nursing, models nursing

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( code nursing (methods or method) algorithm ) or ( modified passive optimization algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( code nursing (methods OR method) algorithm ) OR ( modified passive optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (( code nursing (methods or method) algorithm ) or ( modified passive optimization algorithms ))*.