Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam van cau snippets" » "nam dan cau snippets", "nam va cau snippets", "pham van cau snippets", "nam van dau snippets", "nam van hau snippets", "nam van chat 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 van cau 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 van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.