Perhaps you should try some spelling variations:
"luong cac code snippets" » "luong cuoc code snippets", "luong va code snippets", "luong tai code snippets", "luong cac cong snippets", "luong cac co snippets", "luong cac che snippets", "luong cac code slippers"
"dung ha robot snippets" » "dung a robot snippets", "dung cho robot snippets", "dung tao robot snippets", "dung va robot snippets", "dung he robot snippets", "dung khoa robot snippets", "dung ha robot slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung ha robot snippets") or ("luong cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung ha robot snippets") OR ("luong cac code snippets"))) OR ("locating bug code snippets")).
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