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