Perhaps you should try some spelling variations:
"trinh nhap anh snippets" » "trinh nha anh snippets", "trinh phap anh snippets", "trinh han anh snippets", "trinh nhat anh snippets", "trinh nhan anh snippets", "trinh nhap doanh snippets", "trinh nhap anh slippers"
"dung chung code snippets" » "dung cong code snippets", "dung trung code snippets", "truong chung code snippets", "dung chung co snippets", "dung chung 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 nhap anh snippets") or ("dung chung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh nhap anh snippets") OR ("dung chung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh nhap anh snippets ) or ( dung chung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh nhap anh snippets") or ("dung chung code snippets"))) or ("locating bug code snippets"))*.