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

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 algorithm") OR ("modified objective estimation algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"designed network optimization algorithm\") OR (\"modified objective estimation algorithm\"))".
• Removing quotes may allow a broader search: (( designed network optimization algorithm ) OR ( modified objective estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("designed network optimization algorithm") OR ("modified objective estimation algorithm"))*.