Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam cac ong snippets" » "nam cao ong snippets", "nam sach ong snippets", "nam cac cong snippets", "nam cac dong snippets", "nam cac ung 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 cac ong 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 cac ong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam cac ong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam cac ong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.