Perhaps you should try some spelling variations:
objective optimisation » objective optimization, multiobjective optimization
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
method algorithm » mom algorithm
during training » during weaning, steering training
training method » graining methods, learning method, thinking method

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified objective optimisation algorithm ) or ( during training method algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified objective optimisation algorithm ) OR ( during training method algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified objective optimisation algorithm ) or ( during training method algorithm ))*.