Perhaps you should try some spelling variations:
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"using perturbations and smoking program" » "using perturbation and smoking program" (Expand search), "sink perturbation and smoking program" (Expand search), "under perturbations and smoking program" (Expand search), "using perturbations in smoking program" (Expand search), "using perturbations on smoking program" (Expand search), "using perturbations and restocking program" (Expand search)

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• Adding a wildcard symbol may retrieve word variants: (("using perturbations and smoking program") OR ("base compositional java computers programming"))*.