Perhaps you should try some spelling variations:
"trinh toan code snippets" » "tinh toan code snippets", "thanh toan code snippets", "trinh han code snippets", "trinh toan co snippets", "trinh toan cong snippets", "trinh toan de snippets"
"dung dan code snippets" » "dung dat code snippets", "dung san code snippets", "tung dan code snippets", "dung dan de snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("trinh toan code snippets") or ("dung dan code snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh toan code snippets") OR ("dung dan code snippets"))) OR ("locating bug code slippers"))*.
• Removing quotes may allow a broader search: (((( trinh toan code snippets ) or ( dung dan code snippets ))) or ( locating bug code slippers ))*.