Perhaps you should try some spelling variations:
"using models ppms python programming" » "ising models ppms python programming" (Expand search), "using model ppms python programming" (Expand search), "nursing models ppms python programming" (Expand search), "using models apms python programming" (Expand search), "using models mpms python programming" (Expand search), "using modelo ppm python programming" (Expand search)
"advanced composites using computer program" » "advances composites using computer program" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("advanced composites using computer program") OR ("using models ppms python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced composites using computer program\") OR (\"using models ppms python programming\"))".
• Removing quotes may allow a broader search: (( advanced composites using computer program ) OR ( using models ppms python programming )).
• Adding a wildcard symbol may retrieve word variants: (("advanced composites using computer program") OR ("using models ppms python programming"))*.