Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified cover optimized algorithms" » "modified cover optimized algorithm", "modified cover optimizer algorithms", "modified cover optimization algorithms", "modified covers optimized algorithms", "modified over optimized algorithms"

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

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