Perhaps you should try some spelling variations:
"allocation optimization algorithms" » "allocation optimisation algorithm", "allocation estimation algorithms", "allocation estimation algorithm", "location optimization algorithms"
"parameters estimation algorithmssssssssss" » "parameter estimation algorithmssssssssss", "parameter estimates algorithmssssssssss", "parameter optimization algorithmssssssssss"

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

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