Perhaps you should try some spelling variations:
"trinh truong dan snippets" » "trinh trong dan snippets", "trinh trung dan snippets", "trinh duong dan snippets", "trinh truong dang snippets", "trinh truong danh snippets", "trinh truong dai snippets", "trinh truong dan slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers", "dung bug core snippets"
"locating bug code snippets" » "locating bug code slippers", "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 truong dan snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh truong dan snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh truong dan snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh truong dan snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.