Perhaps you should try some spelling variations:
"advanced populations using computer program" » "advanced computations using computer program" (Expand search), "adapted populations using computer program" (Expand search), "advanced modulation using computer program" (Expand search), "advanced formulations using computer program" (Expand search), "advanced populations and computer program" (Expand search)
"using modes from python programming" » "using models from python programming" (Expand search), "using modis from python programming" (Expand search), "using model from python programming" (Expand search), "using modes from pathogen programming" (Expand search), "using modes from anthony programming" (Expand search), "using codes 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: "((\"advanced populations using computer program\") OR (\"using modes from python programming\"))~".
• Removing quotes may allow a broader search: (( advanced populations using computer program ) OR ( using modes from python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("advanced populations using computer program") OR ("using modes from python programming"))*.