Perhaps you should try some spelling variations:
"lu factorization python python programming" » "lu factorization method python programming" (Expand search), "lu factorization to python programming" (Expand search), "lu factorization into python programming" (Expand search), "lu factorization pythons python programming" (Expand search), "lu factorization piton python programming" (Expand search), "lu factorization pitons python programming" (Expand search)
"coder main vector coding program" » "coder main vector cloning program" (Expand search), "coder main vector loading program" (Expand search), "coder main vector cooling programs" (Expand search), "coder in vector coding program" (Expand search), "coder main factors coding program" (Expand search), "soder maicon vector 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 main vector coding program\") OR (\"lu factorization python python programming\"))~".
• Removing quotes may allow a broader search: (( coder main vector coding program ) OR ( lu factorization python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder main vector coding program") OR ("lu factorization python python programming"))*.