Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat viet chu snippets" » "dao viet chu snippets", "da viet chu snippets", "dai viet chu snippets", "dat viet chau snippets", "dat viet cho snippets", "dat viet cau 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: (((("dat viet chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dat viet chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat viet chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat viet chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.