Perhaps you should try some spelling variations:
"coder precoder _ linear programing" » "coder precoder _ linear programming" (Expand search), "coder precoder _ linear programmin" (Expand search), "coder precoder _ linear program" (Expand search), "coder decoder _ linear programing" (Expand search)
"manim python python python programming" » "manim pythons python python programming" (Expand search), "manim piton python python programming" (Expand search), "manim pitons python python programming" (Expand search), "monty python python python programming" (Expand search), "api python 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: "((\"coder precoder _ linear programing\") OR (\"manim python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder precoder _ linear programing ) OR ( manim python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder precoder _ linear programing") OR ("manim python python python programming"))*.