Perhaps you should try some spelling variations:
objective optimization » multiobjective optimization
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
search algorithm » source algorithm
models using » model using, models nursing, code using
using search » using egarch, nursing research, using servo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified objective optimization algorithm ) OR ( models using search algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified objective optimization algorithm ) or ( models using search algorithm ))*.