Perhaps you should try some spelling variations:
quantization algorithm » estimation algorithm
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
passive quantization » adaptive quantization
modified passive » modified adaptive
df optimization » _ optimization, qoe optimization, _ optimisation
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 optimization algorithm ) OR ( modified passive quantization algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified df optimization algorithm ) OR ( modified passive quantization algorithm ))*.