Perhaps you should try some spelling variations:
"modified objective optimization algorithmss" » "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective estimation algorithm", "modified multiobjective optimization algorithmss"
"defined network estimation algorithms" » "defined network estimation algorithm", "defined network optimization algorithms", "defined network optimisation algorithm"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified objective optimization algorithmss\") OR (\"defined network estimation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified objective optimization algorithmss ) OR ( defined network estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimization algorithmss") OR ("defined network estimation algorithms"))*.