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

Try widening your search to All Fields.

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

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