Perhaps you should try some spelling variations:
"coder coder stratified sampling programming" » "coder coder stratified computing programming" (Expand search), "coder coder stratified ranking programming" (Expand search), "coder coder stratified sampling program" (Expand search), "coder under stratified sampling programming" (Expand search), "coder gender stratified sampling programming" (Expand search), "coder coupled stratified sampling programming" (Expand search), "coder decoder stratified sampling programming" (Expand search), "code code stratified sampling programming" (Expand search), "decoder codec stratified sampling programming" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api 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 stratified sampling programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder stratified sampling programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder stratified sampling programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder stratified sampling programming") OR ("api python python python programming"))*.