Perhaps you should try some spelling variations:
"trinh cua sinh slippers" » "tinh cua sinh slippers", "trinh luat sinh slippers", "trinh quan sinh slippers", "trinh cho sinh slippers", "trinh hoa sinh slippers", "trinh va sinh slippers", "trinh cua sinh slippery", "trinh cua sinh 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 cua sinh 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 cua sinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh cua sinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh cua sinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.