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