Perhaps you should try some spelling variations:
"duong minh java snippets" » "duong manh java snippets", "truong minh java snippets", "thong minh java snippets", "duong trinh java snippets", "duong minh va snippets"
"dung cong che snippets" » "dung trong che snippets", "dung cong cho snippets", "dung cong chi snippets", "dung cong chu 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: (((("duong minh java snippets") or ("dung cong che snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong minh java snippets") OR ("dung cong che snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong minh java snippets ) or ( dung cong che snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong minh java snippets") or ("dung cong che snippets"))) or ("locating bug code snippets"))*.