Perhaps you should try some spelling variations:
"trinh luat code snippets" » "trinh luat cong snippets", "trinh luat de snippets", "trinh luat code slippers"
"huong cau code snippets" » "thuong chau code snippets", "huong dan code snippets", "huong cua code snippets", "huong cau cong snippets", "huong cau de snippets", "huong cfd code snippets", "huong 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: (((("trinh luat code snippets") or ("huong cau code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh luat code snippets") OR ("huong cau code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh luat code snippets ) or ( huong cau code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh luat code snippets") or ("huong cau code snippets"))) or ("locating bug code snippets"))*.