Perhaps you should try some spelling variations:
"defined network optimisation algorithms" » "defined network optimisation algorithm", "defined network optimization algorithms", "defined network estimation algorithms"
"modified objective optimization algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective estimation 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 algorithm\") OR (\"defined network optimisation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified objective optimization algorithm ) OR ( defined network optimisation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimization algorithm") OR ("defined network optimisation algorithms"))*.