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