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