Perhaps you should try some spelling variations:
"codigo python python python programming" » "codigo pythons python python programming" (Expand search), "codigo piton python python programming" (Expand search), "codigo pitons python python programming" (Expand search)
"odor coding using _ programming" » "odor loading using _ programming" (Expand search), "odor modeling using _ programming" (Expand search), "odor drying using _ programming" (Expand search), "color coding using _ programming" (Expand search), "odor binding using _ 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: "((\"odor coding using _ programming\") OR (\"codigo python python python programming\"))~".
• Removing quotes may allow a broader search: (( odor coding using _ programming ) OR ( codigo python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("odor coding using _ programming") OR ("codigo python python python programming"))*.