Perhaps you should try some spelling variations:
"thong dung code snippets" » "thong cong code snippets", "thong thuong code snippets", "thong dung cong snippets", "thong dung co snippets", "thong dung de snippets", "thong dung code slippers"
"dung viet code snippets" » "nang viet code snippets", "cong viet code snippets", "mang viet code snippets", "dung viet co snippets", "dung viet some snippets", "dung viet code slippers"
"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: (((("dung viet code snippets") or ("thong dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung viet code snippets") OR ("thong dung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung viet code snippets ) or ( thong dung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung viet code snippets") or ("thong dung code snippets"))) or ("locating bug code snippets"))*.