Perhaps you should try some spelling variations:
"tran khung luan snippets" » "tran hung luan snippets", "toan khung luan snippets", "tran phuong luan snippets", "tran chung luan snippets", "tran dung luan snippets", "tran hang luan snippets", "tran khung luan 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: (((("tran khung luan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran khung luan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran khung luan snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran khung luan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.