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