Perhaps you should try some spelling variations:
multiobjective optimisation » multiobjective optimization, objective optimization
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
controlled source » controlled study
source algorithm » our algorithm, search algorithm
case controlled » case control, time controlled, target controlled

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

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