Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam cham do snippets" » "nang cham do snippets", "nam chi do snippets", "nam cao do snippets", "nam cham o snippets", "nam pham do snippets", "nam tham 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 cham 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 cham do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam cham do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam cham do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.