Perhaps you should try some spelling variations:
"trinh nhan mo snippets" » "trinh han mo snippets", "trinh phan mo snippets", "trinh nha mo snippets", "trinh nhan my snippets", "trinh nhap mon snippets"
"dung java java snippets" » "dung va java 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 nhan mo snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh nhan mo snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh nhan mo snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh nhan mo snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.