Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"luan danh java snippets" » "luan thanh java snippets", "luan van java snippets", "luan nang java snippets", "luan danh va snippets"
"dung cac cong snippets" » "luong cac cong snippets", "dung cho cong snippets", "dung tai cong snippets", "dung cua cong 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: (((("luan danh java snippets") or ("dung cac cong snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan danh java snippets") OR ("dung cac cong snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( luan danh java snippets ) or ( dung cac cong snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan danh java snippets") or ("dung cac cong snippets"))) or ("locating bugs code snippets"))*.