Perhaps you should try some spelling variations:
"trinh luan data slippers" » "trinh luat data slippers", "trinh quan data slippers", "trinh han data slippers", "trinh luat dat slippers", "trinh luan dac slippers", "trinh luan danh slippers", "trinh luan data slippery", "trinh luan data grippers"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "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: (((("trinh luan data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh luan data slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh luan data slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh luan data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.