Perhaps you should try some spelling variations:
"doc trinh code snippets" » "doc trinh cong snippets", "doc trinh co snippets", "doc trinh cad snippets", "doc tinh code snippets", "doi trinh code snippets", "hoc trinh code snippets", "doc trinh code 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"

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: "((((\"dung java java snippets\") OR (\"doc trinh code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( doc trinh code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("doc trinh code snippets"))) OR ("locating bug code snippets"))*.