Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam phong do snippets" » "hai phong do snippets", "van phong do snippets", "nam trong do snippets", "nam phong mo snippets", "nam phong so snippets", "nam khong 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: (((("nam phong do 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 phong do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam phong do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam phong do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.