Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
evolution algorithm » solution algorithm, evolutionary algorithm, convolution algorithms
df optimization » _ optimization, qoe optimization, _ optimisation
bi1 evolution » time evolution, _ evolution, co evolution
modified bi1 » modified _
modified df » modified _, modified adam

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 bi1 evolution algorithm ) OR ( modified df optimization algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified bi1 evolution algorithm ) OR ( modified df optimization algorithm ))*.