Perhaps you should try some spelling variations:
"trinh hoi trinh snippets" » "trinh hoa trinh snippets", "trinh do trinh snippets", "trinh han trinh snippets", "trinh hoi tinh snippets", "trinh doi trinh snippets", "trinh hoc trinh snippets", "trinh hoi trinh slippers"
"dung dung code snippets" » "duong dung code snippets", "ung dung code snippets", "dung ung code snippets", "dung dung cong snippets", "dung dung co snippets", "dung dung de snippets", "dung dung 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: (((("trinh hoi trinh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh hoi trinh snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trinh hoi trinh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))*.