Perhaps you should try some spelling variations:
"trinh phan luc snippets" » "trinh han luc snippets", "trinh quan luc snippets", "thanh phan luc snippets", "trinh nhan luc snippets", "trinh phan duc snippets", "trinh phan suc snippets", "trinh phan luc slippers"
"dung hung code snippets" » "dung chung code snippets", "dung nhung code snippets", "dung huong code snippets", "dung hung code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

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