Perhaps you should try some spelling variations:
"danh hoc cong snippets" » "danh hoc code snippets", "dan hoc cong snippets", "danh hoa cong snippets", "anh hoc cong snippets", "danh hoc co snippets", "danh cac cong snippets", "danh hoc dung snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

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

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