Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dan nam code snippets" » "dan nam co snippets", "dan lbm code snippets", "dan nam de snippets", "van nam code snippets", "dong nam code snippets", "dinh nam code snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java snippets") OR ("dan nam code snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dung java java snippets\") OR (\"dan nam code snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( dan nam code snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("dan nam code snippets"))) OR ("locating bug core snippets"))*.