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