Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet tu da snippets" » "viet duc da snippets", "viet ngu da snippets", "viet tu dat snippets", "viet tu dau snippets", "viet tu 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 tu 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 tu da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet tu da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet tu da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.