Perhaps you should try some spelling variations:
"modified coverage approximation algorithms" » "modified average approximation algorithms"
"modified market evolution algorithm" » "modified market solution algorithm", "modified market evolutionary algorithm", "modified market convolution algorithms", "modified market regulation algorithm", "modified early evolution algorithm", "modified sales evolution algorithm", "modified male evolution 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 coverage approximation algorithms") OR ("modified market evolution algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified coverage approximation algorithms\") OR (\"modified market evolution algorithm\"))".
• Removing quotes may allow a broader search: (( modified coverage approximation algorithms ) OR ( modified market evolution algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified coverage approximation algorithms") OR ("modified market evolution algorithm"))*.