Perhaps you should try some spelling variations:
"trinh phan cau snippets" » "trinh han cau snippets", "trinh quan cau snippets", "thanh phan cau snippets", "trinh phan dau snippets", "trinh phan cac snippets", "trinh phan tu snippets"
"dung dung code snippets" » "duong dung code snippets", "ung dung code snippets", "dung ung code snippets", "dung dung cong snippets", "dung dung co snippets", "dung dung de snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"trinh phan cau snippets\") OR (\"dung dung code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh phan cau snippets ) OR ( dung dung code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh phan cau snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets"))*.