Perhaps you should try some spelling variations:
"trinh phap lua snippets" » "trinh phan lua snippets", "trinh han lua snippets", "trinh chat lua snippets", "trinh phap luat snippets", "trinh phap luan snippets", "trinh phap luu snippets", "trinh phap lua slippers"
"dung cfd code snippets" » "dung cho code snippets", "dung cua code snippets", "dung co code snippets", "dung cfd code slippers", "dung cfd core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets", "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 phap lua snippets") or ("dung cfd code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh phap lua snippets") OR ("dung cfd code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh phap lua snippets ) or ( dung cfd code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh phap lua snippets") or ("dung cfd code snippets"))) or ("locating bug code snippets"))*.