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