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