Perhaps you should try some spelling variations:
multiobjective optimisation » multiobjective optimization, objective optimization
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
graining methods » learning methods, learning method, making methods
shot graining » shot learning

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• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified multiobjective optimisation algorithm ) OR ( shot graining methods algorithm ))~".
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