Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"colregs graining methods algorithm" » "colregs training methods algorithm", "coarse graining methods algorithm", "colregs learning methods algorithm", "colregs learning method algorithm", "colregs making methods algorithm"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("colregs graining methods algorithm") OR ("modified multiobjective optimization algorithm"))~.
• Removing quotes may allow a broader search: (( colregs graining methods algorithm ) or ( modified multiobjective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("colregs graining methods algorithm") or ("modified multiobjective optimization algorithm"))*.