Perhaps you should try some spelling variations:
"trung tran khoa snippets" » "trung tuan khoa snippets", "trung thanh khoa snippets", "trung tam khoa snippets", "trung toan khoa snippets", "trung san khoa snippets", "trung nhan khoa snippets", "trung tran khoa slippers"
"dung java java slippery" » "dung va java slippery", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java slippery") or ("trung tran khoa snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java slippery") OR ("trung tran khoa snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java slippery ) or ( trung tran khoa snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java slippery") or ("trung tran khoa snippets"))) or ("locating bug code snippets"))*.