Perhaps you should try some spelling variations:
"modified multiobjective optimized algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective optimized algorithm", "modified multiobjective optimizer algorithms"
"defined network approximation algorithm" » "defined network approximation algorithms", "designed network approximation algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("defined network approximation algorithm") OR ("modified multiobjective optimized algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"defined network approximation algorithm\") OR (\"modified multiobjective optimized algorithms\"))*".
• Removing quotes may allow a broader search: (( defined network approximation algorithm ) OR ( modified multiobjective optimized algorithms ))*.