Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam cong de snippets" » "nam cuong de snippets", "nam dong de snippets", "dam cong de snippets", "nam cong da snippets", "nam cong ve snippets", "nam cong dieu 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 cong de 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 cong de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam cong de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam cong de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.