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

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

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