Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan quan voi snippets" » "van quan voi snippets", "ban quan voi snippets", "dan luan voi snippets", "dan quan doi snippets", "dan quan vi snippets", "dan quen voi 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 quan voi 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 quan voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan quan voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan quan voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.