Perhaps you should try some spelling variations:
"modified coverage approximation algorithms" » "modified average approximation algorithms"
"modified global evolution algorithms" » "modified global evolution algorithm", "modified global convolution algorithms", "modified global solution algorithm", "modified global solutions algorithms", "modified global production algorithms", "modified global edition algorithms"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified global evolution algorithms") OR ("modified coverage approximation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified global evolution algorithms\") OR (\"modified coverage approximation algorithms\"))".
• Removing quotes may allow a broader search: (( modified global evolution algorithms ) OR ( modified coverage approximation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified global evolution algorithms") OR ("modified coverage approximation algorithms"))*.