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

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