Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
convolution algorithms » evolution algorithm
solution algorithm » evolution algorithm, evolutionary algorithm, estimation algorithm
differential » different

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

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