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