Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
bayesian optimisation » bayesian optimization
studies algorithm » source algorithm
clinical studies » clinical ethics
pre clinical » post clinical, term clinical, _ clinical

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( pre clinical studies algorithm ) or ( modified bayesian optimisation algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( pre clinical studies algorithm ) OR ( modified bayesian optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( pre clinical studies algorithm ) or ( modified bayesian optimisation algorithm ))*.