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

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified graining methods algorithm") OR ("modified multiobjective optimisation algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified graining methods algorithm\") OR (\"modified multiobjective optimisation algorithm\"))*".
• Removing quotes may allow a broader search: (( modified graining methods algorithm ) OR ( modified multiobjective optimisation algorithm ))*.