Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dung han tap snippets" » "dung nhan tap snippets", "dung phan tap snippets", "dung ha tap snippets", "dung han tai snippets", "dung toan tap snippets", "dung nhan tai snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("dung han tap snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("dung han tap snippets"))) OR ("locating bug core snippets")).
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