Perhaps you should try some spelling variations:
"modified allocation optimization algorithms" » "modified allocation optimisation algorithm", "modified allocation estimation algorithm", "modified allocation optimized algorithms"
"modified location estimation algorithms" » "modified location estimation algorithm", "modified location optimisation algorithm", "modified location approximation algorithms", "modified motion estimation algorithms", "modified carbon estimation 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 allocation optimization algorithms") OR ("modified location estimation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified allocation optimization algorithms\") OR (\"modified location estimation algorithms\"))".
• Removing quotes may allow a broader search: (( modified allocation optimization algorithms ) OR ( modified location estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified allocation optimization algorithms") OR ("modified location estimation algorithms"))*.