Perhaps you should try some spelling variations:
"modified time approximation algorithms" » "modified one approximation algorithms", "modified _ approximation algorithms", "modified bi1 approximation algorithms", "modified male approximation algorithms"
"modified time solution algorithm" » "modified time evolution algorithm", "modified time convolution algorithms", "modified time evolutionary algorithm", "modified bi1 solution algorithm", "modified male solution algorithm", "modified time solutions algorithm", "modified optimal solution algorithm"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified time approximation algorithms\") OR (\"modified time solution algorithm\"))~".
• Removing quotes may allow a broader search: (( modified time approximation algorithms ) OR ( modified time solution algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified time approximation algorithms") OR ("modified time solution algorithm"))*.