Perhaps you should try some spelling variations:
objective optimisation » objective optimization, multiobjective 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 objective optimisation algorithm ) OR ( case controlled source algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified objective optimisation algorithm ) OR ( case controlled source algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( modified objective optimisation algorithm ) OR ( case controlled source algorithm ))*.