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

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