Perhaps you should try some spelling variations:
"modified coverage approximation algorithms" » "modified average approximation algorithms"
"modified trained solution algorithm" » "modified trained evolution algorithm", "modified trained convolution algorithms", "modified trained evolutionary algorithm", "modified traces solution algorithm", "modified saline solution 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 trained solution algorithm") OR ("modified coverage approximation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified trained solution algorithm\") OR (\"modified coverage approximation algorithms\"))*".
• Removing quotes may allow a broader search: (( modified trained solution algorithm ) OR ( modified coverage approximation algorithms ))*.