Perhaps you should try some spelling variations:
multiobjective optimisation » multiobjective optimization, objective optimization
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
model using » code using, models nursing, powder using
2 algorithm » _ algorithm, _ algorithms, _ algorithmic
using 2 » using a, using _, using 3

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 multiobjective optimisation algorithm ) OR ( model using 2 algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified multiobjective optimisation algorithm ) OR ( model using 2 algorithm ))*.