Perhaps you should try some spelling variations:
"dong tinh java snippets" » "dong kinh java snippets", "dong tin java snippets", "cong tinh java snippets", "dong trinh java snippets", "dong think java snippets", "dong tinh va snippets"
"dung cac che snippets" » "luong cac che snippets", "dung cho che snippets", "dung tai che snippets", "dung cac he snippets", "dung cac chien snippets", "dung cac chat 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: (((("dong tinh java snippets") or ("dung cac che snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong tinh java snippets") OR ("dung cac che snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tinh java snippets ) or ( dung cac che snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tinh java snippets") or ("dung cac che snippets"))) or ("locating bug code snippets"))*.