Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"modified aging estimation algorithmss" » "modified aging estimation algorithms", "modified aging estimation algorithm", "modified lighting estimation algorithmss", "modified risk estimation algorithmss", "modified caging estimation algorithmss"

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

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