Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc thuan vo snippets" » "duc tan vo snippets", "duc thang vo snippets", "duc phan vo snippets", "duc than vo snippets", "duc thuan loi snippets", "duc thuat do 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: (((("python using java snippets") or ("duc thuan vo snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("duc thuan vo snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( duc thuan vo snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("duc thuan vo snippets"))) or ("locating bug code snippets"))*.