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 tong cot snippets" » "dong thong cot snippets", "dong trong cot snippets", "long tong cot snippets", "dong tong cong snippets", "dong tong hop snippets", "dong dong co 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 tong cot 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 tong cot snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tinh java snippets ) or ( dong tong cot snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tinh java snippets") or ("dong tong cot snippets"))) or ("locating bug code snippets"))*.