Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
modified invasive » modified passive
modified saline » modified caging, modified male, modified passive

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

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