Perhaps you should try some spelling variations:
"trinh dan tinh snippets" » "trinh han tinh snippets", "trinh van tinh snippets", "trinh san tinh snippets", "trinh doan tinh snippets", "trinh dang tinh snippets", "trinh dan trinh snippets", "trinh dan tinh 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 dan tinh snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh dan tinh snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh dan tinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.