Perhaps you should try some spelling variations:
"trinh dung cong snippets" » "trinh dung trong snippets"
"dung vong code snippets" » "dung von code snippets", "dung dong code snippets", "dung hong code snippets", "dung vong core snippets"
"locating bug code snippets" » "locating bug core snippets", "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 dung cong snippets") or ("dung vong code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh dung cong snippets") OR ("dung vong code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh dung cong snippets ) or ( dung vong code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh dung cong snippets") or ("dung vong code snippets"))) or ("locating bug code snippets"))*.