Perhaps you should try some spelling variations:
"modified bi1 approximation algorithm" » "modified bi1 approximation algorithms", "modified time approximation algorithm", "modified _ approximation algorithm", "modified one approximation algorithm"
"modified static optimization algorithm" » "modified static optimization algorithms", "modified static optimisation algorithm", "modified static estimation algorithm", "modified stage optimization algorithm", "modified stochastic optimization algorithm", "modified staffing optimization 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 static optimization algorithm\") OR (\"modified bi1 approximation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified static optimization algorithm ) OR ( modified bi1 approximation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified static optimization algorithm") OR ("modified bi1 approximation algorithm"))*.