Perhaps you should try some spelling variations:
"dung tinh java snippets" » "dang tinh java snippets", "dung ninh java snippets", "dung tin java snippets", "dung trinh java snippets", "dung think java snippets", "dung tinh va snippets"
"dong dan cac snippets" » "dong danh cac snippets", "duong dan cac snippets", "dong san cac snippets", "dong dan cach snippets", "dong dang cac snippets", "dong dan ca snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

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