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