Perhaps you should try some spelling variations:
"dung nhung cau snippets" » "dung chung cau snippets", "dung nhan cau snippets", "dung trung cau snippets", "dung chung cu snippets", "dung nhung bai snippets", "dung nhu cau snippets"
"hanh java java snippets" » "hanh va java 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: (((("hanh java java snippets") or ("dung nhung cau snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh java java snippets") OR ("dung nhung cau snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh java java snippets ) or ( dung nhung cau snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh java java snippets") or ("dung nhung cau snippets"))) or ("locating bug code snippets"))*.