Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nan danh chi snippets" » "ngan danh chi snippets", "nang danh chi snippets", "nam danh chi snippets", "nan danh cho snippets", "nan dinh chi snippets", "nan banh chi 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: (((("nan danh chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nan danh chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nan danh chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nan danh chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.