Perhaps you should try some spelling variations:
"coder coder problema linear programming" » "coder coder problemas lineares programming" (Expand search), "coder coder programa linear programming" (Expand search), "coder coder problema semilinear programming" (Expand search), "coder poder problemas linear programming" (Expand search), "coder come problema linear programming" (Expand search), "coder modelo problema linear programming" (Expand search), "coder decoder problema linear programming" (Expand search), "code code problema linear programming" (Expand search), "decoder codec problema linear programming" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder problema linear programming") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder problema linear programming\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder problema linear programming ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder problema linear programming") OR ("on python python python programming"))*.