Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan nam long snippets" » "dan nam dong snippets", "dan nam lang snippets", "dan nam trong snippets", "van nam long snippets", "dong nam long snippets", "dinh nam long 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 long 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 long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan nam long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan nam long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.