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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified co solution algorithm ) OR ( modified df optimization algorithms ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified co solution algorithm ) OR ( modified df optimization algorithms ))".
• Adding a wildcard symbol may retrieve word variants: (( modified co solution algorithm ) OR ( modified df optimization algorithms ))*.