Perhaps you should try some spelling variations:
"trinh hanh tu snippets" » "trinh thanh tu snippets", "trinh han tu snippets", "trinh anh tu snippets", "trinh danh tu snippets", "trinh hanh tu slippers"
"dung cac code snippets" » "luong cac code snippets", "dung cho code snippets", "dung tai code snippets", "dung cac cong snippets", "dung cac co snippets", "dung cac che snippets", "dung cac code slippers"
"locating bug code snippets" » "locating bug code slippers", "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 hanh tu snippets\") OR (\"dung cac code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh hanh tu snippets ) OR ( dung cac code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh hanh tu snippets") OR ("dung cac code snippets"))) OR ("locating bug code snippets"))*.