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