Perhaps you should try some spelling variations:
"tan doanh cao snippets" » "toan doanh cao snippets", "van doanh cao snippets", "ban doanh cao snippets", "tan doanh co snippets", "tan doanh bao snippets", "tan doanh cho 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: (((("tan doanh cao snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan doanh cao snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan doanh cao snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan doanh cao snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.