Perhaps you should try some spelling variations:
"doanh anh cho snippets" » "doanh doanh cho snippets", "doanh thanh cho snippets", "doanh sang cho snippets", "doanh danh cho snippets", "doanh anh tho snippets", "doanh anh co 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 anh cho 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 anh cho snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doanh anh cho snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doanh anh cho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.