Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam nhat can snippets" » "pham nhat can snippets", "am nhac can snippets", "cam nhan can snippets", "nam nhat ban snippets", "nam nhat tan snippets", "nam what can 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 nhat can 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 nhat can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam nhat can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam nhat can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.