Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan voi can snippets" » "dan hoi can snippets", "ban voi can snippets", "da voi can snippets", "dan voi cac snippets", "dan voi cong snippets", "dan voi hang 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 voi can 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 voi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan voi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan voi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.