Perhaps you should try some spelling variations:
"modified multiobjective optimizer algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective optimized algorithms", "modified multiobjective optimized algorithm"
"code learning estimation algorithm" » "code learning emotion algorithm", "code lighting estimation algorithm", "how learning estimation algorithm"

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

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