Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet theo de snippets" » "viet tien de snippets", "viet thuc de snippets", "viet tiep de snippets", "viet theo yeu snippets", "viet theo dau snippets", "viet theo doi 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 theo de 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 theo de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet theo de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet theo de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.