Perhaps you should try some spelling variations:
"van thanh code snippets" » "van thanh cong snippets", "van thanh de snippets", "ban thanh code snippets", "van tuan code snippets", "van thanh code slippers"
"dung hbug code snippets" » "dung hong code snippets", "dung hung code snippets", "dung hbug code slippers", "dung hbung code snippets", "dung hbugs code snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("van thanh code snippets") or ("dung hbug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van thanh code snippets") OR ("dung hbug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van thanh code snippets ) or ( dung hbug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van thanh code snippets") or ("dung hbug code snippets"))) or ("locating bug code snippets"))*.