Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan nam son snippets" » "van nam son snippets", "dong nam son snippets", "dinh nam son snippets", "dan nam so snippets", "dan lam son snippets", "dan sam son 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: (((("dan nam son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan nam son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan nam son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan nam son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.