Perhaps you should try some spelling variations:
"angle optimization python python programming" » "angle optimization method python programming" (Expand search), "angle optimization option python programming" (Expand search), "angle optimization methods python programming" (Expand search), "engine optimization python python programming" (Expand search), "the optimization python python programming" (Expand search), "shape optimization python python programming" (Expand search), "angle optimization pythons python programming" (Expand search), "angle optimization piton python programming" (Expand search), "angle optimization pitons python programming" (Expand search)
"pid controller code coding program" » "pid controller and coding program" (Expand search), "pid controller on coding program" (Expand search), "pid controller of coding program" (Expand search), "pid controllers code coding program" (Expand search), "pid controller code cloning program" (Expand search), "pid controller code loading program" (Expand search), "pid controller code cooling programs" (Expand search), "pid controller code codigo program" (Expand search), "pid controller code according 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: "((\"pid controller code coding program\") OR (\"angle optimization python python programming\"))~".
• Removing quotes may allow a broader search: (( pid controller code coding program ) OR ( angle optimization python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("pid controller code coding program") OR ("angle optimization python python programming"))*.