Perhaps you should try some spelling variations:
"trinh van tuan snippets" » "trinh han tuan snippets", "trinh quan tuan snippets", "trinh toan tuan snippets", "trinh van quan snippets", "trinh van ban snippets", "trinh anh tuan snippets", "trinh van tuan slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 van tuan snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh van tuan snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh van tuan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.