Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
parameters optimization » parameter optimization, parameter estimation
estimation algorithmss » estimation algorithms, estimation algorithm
df estimation » _ estimation
modified df » modified _, modified adam, modified bi1

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 estimation algorithmss ) OR ( modified parameters optimization algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified df estimation algorithmss ) OR ( modified parameters optimization algorithms ))*.