Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan viet ve snippets" » "danh viet ve snippets", "san viet ve snippets", "dao viet ve snippets", "dan biet ve snippets", "dan viet va snippets", "dan viet viet 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 viet ve 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 viet ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan viet ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan viet ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.