Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong dan den snippets" » "cong dan code snippets", "cong san den snippets", "cong tan den snippets", "huong dan den snippets", "cong ban den snippets", "cong van den snippets", "cong dan dung snippets"
"dung java java snippets" » "dung va java snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cong dan den snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dan den snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong dan den snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dan den snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.