Perhaps you should try some spelling variations:
"dung chung dat snippets" » "dung cong dat snippets", "dung trung dat snippets", "truong chung dat snippets", "dung chung bat snippets", "dung cung dat snippets", "dung dung dat snippets", "dung chung dat slippers"
"trinh cau code snippets" » "trinh chat code snippets", "trinh chao code snippets", "trinh tu code snippets", "trinh cau cong snippets", "trinh cau de snippets", "trinh cfd code snippets", "trinh cau 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 chung dat snippets") or ("trinh cau code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung chung dat snippets") OR ("trinh cau code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung chung dat snippets ) or ( trinh cau code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung chung dat snippets") or ("trinh cau code snippets"))) or ("locating bug code snippets"))*.