Perhaps you should try some spelling variations:
"modified df optimization algorithmssss" » "modified df optimization algorithms", "modified df optimisation algorithm", "modified _ optimization algorithmssss", "modified qoe optimization algorithmssss", "modified _ optimisation algorithmssss", "modified adam optimization algorithmssss", "modified bi1 optimization algorithmssss"
"modified parameters estimation algorithm" » "modified parameter estimation algorithm", "modified parameter estimates algorithm", "modified parameter optimization 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: "((\"modified df optimization algorithmssss\") OR (\"modified parameters estimation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified df optimization algorithmssss ) OR ( modified parameters estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified df optimization algorithmssss") OR ("modified parameters estimation algorithm"))*.