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

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: "((\"defined network optimization algorithm\") OR (\"modified objective estimation algorithmss\"))~".
• Removing quotes may allow a broader search: (( defined network optimization algorithm ) OR ( modified objective estimation algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (("defined network optimization algorithm") OR ("modified objective estimation algorithmss"))*.