Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khac son den snippets" » "khach san den snippets", "khanh son den snippets", "thai son den snippets", "khac don den snippets", "khac son tren snippets", "khac song don 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: (((("khac son den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khac son den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khac son den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khac son den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.