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