Perhaps you should try some spelling variations:
"coder coder convex optimisation problems" » "coder coder convex optimization problems" (Expand search), "coder coder convex optimization problem" (Expand search), "coder coder convex optimization process" (Expand search), "coder coder nonconvex optimization problems" (Expand search), "coder coder complex optimization problems" (Expand search), "coder closed convex optimisation problems" (Expand search), "coder or convex optimisation problems" (Expand search), "coder some convex optimisation problems" (Expand search), "coder decoder convex optimisation problems" (Expand search), "code code convex optimisation problems" (Expand search), "decoder codec convex optimisation problems" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons python 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 convex optimisation problems") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder convex optimisation problems\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder convex optimisation problems ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder convex optimisation problems") OR ("_ python python python programming"))*.