Perhaps you should try some spelling variations:
"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"
"tang tai code snippets" » "hang tai code snippets", "dung tai code snippets", "sang tao code snippets", "tang tai cong snippets", "tang tai co snippets", "tang tai hoe snippets", "tang tai 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: (((("trinh cau code snippets") or ("tang tai code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh cau code snippets") OR ("tang tai code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh cau code snippets ) or ( tang tai code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh cau code snippets") or ("tang tai code snippets"))) or ("locating bug code snippets"))*.