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

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 algorithmssssss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("allocation optimization algorithms") OR ("parameters estimation algorithmssssss")).
• Removing quotes may allow a broader search: (( allocation optimization algorithms ) or ( parameters estimation algorithmssssss )).
• Adding a wildcard symbol may retrieve word variants: (("allocation optimization algorithms") or ("parameters estimation algorithmssssss"))*.