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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("core graining methods algorithm") OR ("modified objective optimization algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"core graining methods algorithm\") OR (\"modified objective optimization algorithms\"))".
• Removing quotes may allow a broader search: (( core graining methods algorithm ) OR ( modified objective optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("core graining methods algorithm") OR ("modified objective optimization algorithms"))*.