Perhaps you should try some spelling variations:
"modified multiobjective optimizer algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective optimized algorithms", "modified multiobjective optimized algorithm"
"colregs learning method algorithm" » "colregs training method algorithm", "colregs learning mom algorithm", "colregs learning methods algorithm", "colregs graining methods algorithm", "colregs learning emotion algorithm"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("colregs learning method algorithm") or ("modified multiobjective optimizer algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("colregs learning method algorithm") OR ("modified multiobjective optimizer algorithms")).
• Removing quotes may allow a broader search: (( colregs learning method algorithm ) or ( modified multiobjective optimizer algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("colregs learning method algorithm") or ("modified multiobjective optimizer algorithms"))*.