Perhaps you should try some spelling variations:
"teaching computation using computer program" » "teaching computational using computer program" (Expand search), "teaching competitions using computer program" (Expand search), "teaching compensation using computer program" (Expand search), "teaching computations using computer program" (Expand search), "teaching computation in computer program" (Expand search), "teaching composition using computer program" (Expand search)
"using four from python programming" » "using four from pathogen programming" (Expand search), "using four from anthony programming" (Expand search), "using fourier from python programming" (Expand search), "using flour from python programming" (Expand search), "using femur from python programming" (Expand search), "using odour from python programming" (Expand search)

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: "((\"teaching computation using computer program\") OR (\"using four from python programming\"))~".
• Removing quotes may allow a broader search: (( teaching computation using computer program ) OR ( using four from python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("teaching computation using computer program") OR ("using four from python programming"))*.