Perhaps you should try some spelling variations:
"coder coder in string problems" » "coder coder in string problem" (Expand search), "coder coder in sharing problems" (Expand search), "coder coder in sorting problems" (Expand search), "coder decoder in string problems" (Expand search), "code code in string problems" (Expand search), "decoder codec in string problems" (Expand search), "coder code in string problems" (Expand search), "coder codes in string problems" (Expand search), "coder poder in string problems" (Expand search)
"api pythons python python programming" » "api pitons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pythons piton python programming" (Expand search), "api pythons pitons python programming" (Expand search), "api pythons pytm python programming" (Expand search), "api python 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 in string problems") OR ("api pythons python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder in string problems\") OR (\"api pythons python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder in string problems ) OR ( api pythons python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder in string problems") OR ("api pythons python python programming"))*.