Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam dac cho snippets" » "nam dan cho snippets", "nam cac cho snippets", "nam da cho snippets", "nam day cho snippets", "nam danh cho 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 dac cho 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 dac cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam dac cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam dac cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.