Perhaps you should try some spelling variations:
"doan dieu chim snippets" » "nhan dieu chim snippets", "dang dieu chim snippets", "toan dien chim snippets", "doan dieu chinh snippets", "doan hieu chi snippets", "doan dieu 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: (((("doan dieu chim snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan dieu chim snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan dieu chim snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan dieu chim snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.