Perhaps you should try some spelling variations:
"dung nhat doc snippets" » "dung nhan doc snippets", "dang nhat doc snippets", "dung nha doc snippets", "dung chat doc snippets", "dung nhat nuoc snippets", "dung nhanh doc snippets"
"using a code snippets" » "using a core snippets"
"locating bug code snippets" » "locating bug core 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: "((((\"using a code snippets\") OR (\"dung nhat doc snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using a code snippets ) OR ( dung nhat doc snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") OR ("dung nhat doc snippets"))) OR ("locating bug code snippets"))*.