Perhaps you should try some spelling variations:
"period optimization python python programming" » "period optimization method python programming" (Expand search), "period optimization option python programming" (Expand search), "period optimization methods python programming" (Expand search), "method optimization python python programming" (Expand search), "operation optimization python python programming" (Expand search), "hybrid optimization python python programming" (Expand search), "period optimization pythons python programming" (Expand search), "period optimization piton python programming" (Expand search), "period optimization pitons python programming" (Expand search)
"coder functions in coding program" » "power functions in coding program" (Expand search), "order functions in coding program" (Expand search), "colour functions in coding program" (Expand search), "coder functions in cloning program" (Expand search), "coder functions in loading program" (Expand search), "coder functions in cooling programs" (Expand search), "coder functions on coding program" (Expand search), "coder functions in decoding program" (Expand search), "coder functions non coding 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: "((\"coder functions in coding program\") OR (\"period optimization python python programming\"))~".
• Removing quotes may allow a broader search: (( coder functions in coding program ) OR ( period optimization python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder functions in coding program") OR ("period optimization python python programming"))*.