Perhaps you should try some spelling variations:
"tran khoa dat snippets" » "toan khoa dat snippets", "san khoa dat snippets", "nhan khoa dat snippets", "tran hoa dat snippets", "tran khoa dang snippets", "tran khoan dau snippets", "tran khoa dat 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 khoa dat 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 khoa dat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran khoa dat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran khoa dat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.