Perhaps you should try some spelling variations:
"modified changing optimisation algorithm" » "modified changing optimization algorithms", "modified changing estimation algorithm", "modified changing estimation algorithms", "modified staffing optimization algorithm", "modified caging optimisation algorithm"
"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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified changing optimisation algorithm") OR ("defined network optimization algorithm"))~.
• Removing quotes may allow a broader search: (( modified changing optimisation algorithm ) or ( defined network optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified changing optimisation algorithm") or ("defined network optimization algorithm"))*.