Perhaps you should try some spelling variations:
"cong doan theo snippets" » "cong dan theo snippets", "cong hoan theo snippets", "dong doanh theo snippets", "cong soan theo snippets", "cong oan theo snippets", "cong doan thien snippets", "cong doan theo 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 theo 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 theo snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong doan theo snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong doan theo snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.