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