Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet doi da snippets" » "viet duoi da snippets", "viet voi da snippets", "nhiet doi da snippets", "viet doi dau snippets", "viet doi dam snippets", "viet doi dan 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: (((("viet doi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet doi da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet doi da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet doi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.