Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
source algorithm » our algorithm, search algorithm
learning source » learning journey
a learning » _ learning, _ learing, how learning
parameter » parameters

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

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