Perhaps you should try some spelling variations:
"doanh tinh cac snippets" » "doan tinh cac snippets", "doanh thanh cac snippets", "nhanh tinh cac snippets", "doanh tinh cach snippets", "doanh trinh cac snippets", "doanh tich cac 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 tinh 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 tinh cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doanh tinh cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doanh tinh cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.