Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam duoi deu snippets" » "nam duoc deu snippets", "nam doi deu snippets", "dam duoi deu snippets", "nam tuoi dep snippets", "nam doi de 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 duoi deu 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 duoi deu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam duoi deu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam duoi deu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.