Perhaps you should try some spelling variations:
multiobjective optimisation » multiobjective optimization, objective optimization
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
based cross » based roms, based access, based closed
code based » model based, coal based, income based

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 ( code based cross algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified multiobjective optimisation algorithm ) OR ( code based cross algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified multiobjective optimisation algorithm ) or ( code based cross algorithm ))*.