Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do duc toan snippets" » "do duc tan snippets", "do duc ton snippets", "do duc hoan snippets", "dao duc toan snippets", "do duy toan snippets"
"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: (((("python using java snippets") or ("do duc toan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("do duc toan snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( do duc toan snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("do duc toan snippets"))) or ("locating bug code snippets"))*.