Perhaps you should try some spelling variations:
"trinh viet code snippets" » "ninh viet code snippets", "trinh vat code snippets", "trinh viet co snippets", "trinh viet some snippets", "trinh viet code slippers"
"dung cua dat snippets" » "dung luan dat snippets", "dung cho dat snippets", "dung cua dan snippets", "dung cua vat snippets", "dung cua dai snippets", "dung cua dat 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 viet code snippets\") OR (\"dung cua dat snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( trinh viet code snippets ) OR ( dung cua dat snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trinh viet code snippets") OR ("dung cua dat snippets"))) OR ("locating bug code snippets"))*.