Perhaps you should try some spelling variations:
"trinh toan trinh snippets" » "tinh toan trinh snippets", "thanh toan trinh snippets", "trinh han trinh snippets", "trinh thanh trinh snippets", "trinh trang trinh snippets", "trinh toan tin snippets", "trinh toan trinh slippers"
"dung ung code snippets" » "dung trung code snippets", "dung quang code snippets", "dung chung code snippets", "dung ung co snippets", "dung ung 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 toan trinh snippets") or ("dung ung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh toan trinh snippets") OR ("dung ung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh toan trinh snippets ) or ( dung ung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh toan trinh snippets") or ("dung ung code snippets"))) or ("locating bug code snippets"))*.