Perhaps you should try some spelling variations:
"allocation optimization algorithmssssss" » "allocation optimization algorithms", "allocation optimisation algorithm", "location optimization algorithmssssss"
"parameters estimation algorithms" » "parameter estimation algorithms", "parameter estimates algorithms", "parameter optimization algorithms", "parameters estimation algorithm", "parameters optimization algorithms", "parameters optimisation 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: "((\"allocation optimization algorithmssssss\") OR (\"parameters estimation algorithms\"))~".
• Removing quotes may allow a broader search: (( allocation optimization algorithmssssss ) OR ( parameters estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("allocation optimization algorithmssssss") OR ("parameters estimation algorithms"))*.