Perhaps you should try some spelling variations:
"dong trinh java snippets" » "cong trinh java snippets", "dong tinh java snippets", "dong tranh java snippets"
"dung luan code snippets" » "dung luan cong snippets", "dung luan che snippets", "dung luan de 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 luan code snippets") or ("dong trinh java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung luan code snippets") OR ("dong trinh java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung luan code snippets ) or ( dong trinh java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung luan code snippets") or ("dong trinh java snippets"))) or ("locating bug core snippets"))*.