Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"tan van code snippets" » "tan van de snippets", "tan van hoe snippets", "tan van cong snippets", "tran van code snippets", "tang van code snippets", "luan van code snippets"
"locating bug core snippets" » "locating bug 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 (\"tan van code snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( tan van code snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("tan van code snippets"))) OR ("locating bug core snippets"))*.