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