Perhaps you should try some spelling variations:
"teaching computational python computer program" » "using computational python computer program" (Expand search), "teaching educational python computer program" (Expand search), "applying computational python computer program" (Expand search), "teaching computacional python computer program" (Expand search), "teaching computacional vpython computer program" (Expand search), "teaching computacionais python computer program" (Expand search)
"an introduction of pulling program" » "an introduction to pulling program" (Expand search), "an introduction of culling program" (Expand search), "an introduction of spelling program" (Expand search), "an introduction of spelling programs" (Expand search), "an introduction of pulsing program" (Expand search), "an introduction of pulping program" (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: "((\"an introduction of pulling program\") OR (\"teaching computational python computer program\"))~".
• Removing quotes may allow a broader search: (( an introduction of pulling program ) OR ( teaching computational python computer program ))~.
• Adding a wildcard symbol may retrieve word variants: (("an introduction of pulling program") OR ("teaching computational python computer program"))*.