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