Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified positive evolution algorithm" » "modified positive solution algorithm", "modified positive evolutionary algorithm", "modified positive convolution algorithms", "modified positive solutions algorithm", "modified passive evolution algorithm", "modified adaptive evolution algorithm"

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

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