Perhaps you should try some spelling variations:
"designed network approximation algorithm" » "designed network approximation algorithms", "defined network approximation algorithm"
"modified invasive optimisation algorithm" » "modified invasive optimization algorithms", "modified invasive estimation algorithm", "modified invasive estimation algorithms", "modified passive optimisation algorithm"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("designed network approximation algorithm") or ("modified invasive optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("designed network approximation algorithm") OR ("modified invasive optimisation algorithm")).
• Removing quotes may allow a broader search: (( designed network approximation algorithm ) or ( modified invasive optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("designed network approximation algorithm") or ("modified invasive optimisation algorithm"))*.