Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"toc van hung snippets" » "toc van dung snippets", "toc manh hung snippets", "toc van duong snippets", "hoc van hung snippets", "toc san hung snippets", "tac van hung 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 ("toc van hung snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("toc van hung snippets"))) OR ("locating bug core snippets")).
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