Perhaps you should try some spelling variations:
"trinh toan phuc snippets" » "tinh toan phuc snippets", "thanh toan phuc snippets", "trinh han phuc snippets", "trinh toan thuc snippets", "trinh trang phuc snippets", "trinh doan phuoc snippets", "trinh toan phuc slippers"
"dung rung code snippets" » "dung trung code snippets", "duong rung code snippets", "dung ung code snippets", "dung rung code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

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 phuc snippets") or ("dung rung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh toan phuc snippets") OR ("dung rung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh toan phuc snippets ) or ( dung rung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh toan phuc snippets") or ("dung rung code snippets"))) or ("locating bug code snippets"))*.