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

Try widening your search to All Fields.

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