Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc toan duc slippers" » "duc tan duc slippers", "duc ton duc slippers", "duc hoan duc slippers", "duc tran duc slippers", "duc toan du slippers", "duc toan duc slippery", "duc toan duc grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("duc toan duc slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc toan duc slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc toan duc slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc toan duc slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.