Perhaps you should try some spelling variations:
"coder code in sequential sampling" » "coder code and sequential sampling" (Expand search), "coder code _ sequential sampling" (Expand search), "coder code of sequential sampling" (Expand search), "code code in sequential sampling" (Expand search), "modern code in sequential sampling" (Expand search), "color code in sequential sampling" (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder code in sequential sampling\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder code in sequential sampling ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder code in sequential sampling") OR ("_ python python python programming"))*.