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