Perhaps you should try some spelling variations:
parameters optimization » parameter optimization, parameter estimation
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
graining methods » learning methods, learning method, making methods
based graining » based training, based learning

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: "(( based graining methods algorithm ) OR ( modified parameters optimization algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (( based graining methods algorithm ) OR ( modified parameters optimization algorithm ))*.