Perhaps you should try some spelling variations:
approximation algorithm » approximation algorithms
market approximation » one approximation, time approximation
forecasting method » focusing method, forecasting mixed
code forecasting » _ forecasting, a forecasting
method algorithm » mom algorithm
modified market » modified male

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• The words AND, OR and NOT may confuse the search; try adding quotes: "(( code forecasting method algorithm ) OR ( modified market approximation algorithm ))~".
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