Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam duoc de snippets" » "nam thuoc de snippets", "da duoc de snippets", "dat duoc de snippets", "nam buoc de snippets", "nam duoc do snippets", "nam duoc dien 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: (((("nam duoc de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam duoc de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam duoc de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam duoc de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.