Perhaps you should try some spelling variations:
"trinh cau can snippets" » "trinh chat can snippets", "trinh chao can snippets", "trinh tu can snippets", "trinh cau chan snippets", "trinh hau can snippets", "trinh cap can snippets"
"dung cong cong snippets" » "dung trong cong snippets", "dung cong dong snippets", "dung dang cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 can snippets") or ("dung cong cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh cau can snippets") OR ("dung cong cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh cau can snippets ) or ( dung cong cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh cau can snippets") or ("dung cong cong snippets"))) or ("locating bug code snippets"))*.