Perhaps you should try some spelling variations:
"pair solution modelling and control" » "pairs solution modelling and control" (Expand Search), "pair resolution modelling and control" (Expand Search), "pair evolution modelling and control" (Expand Search)
"pain solution modelling and control" » "pain resolution modelling and control" (Expand Search), "pain evolution modelling and control" (Expand Search), "main solution modelling and control" (Expand Search), "gain solution modelling and control" (Expand Search)

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