Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
df optimization » _ optimization, qoe optimization, _ optimisation
modified time » modified bi1, modified male
time solution » time solutions, time evolution, optimal solution
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 time solution algorithm ) OR ( modified df optimization algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified time solution algorithm ) OR ( modified df optimization algorithm ))*.