Perhaps you should try some spelling variations:
"code code using controlled problem" » "code code using controlled probe" (Expand search), "code code using control problem" (Expand search), "code code using controlled parallel" (Expand search), "code code during controlled problem" (Expand search), "code code blind controlled problem" (Expand search), "code code and controlled problem" (Expand search), "code made using controlled problem" (Expand search), "code coding using controlled problem" (Expand search), "code cdc using controlled problem" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons python 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: "((\"code code using controlled problem\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( code code using controlled problem ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("code code using controlled problem") OR ("_ python python python programming"))*.