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