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