Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"chu trinh he snippets" » "chu trinh code snippets", "chu thich he snippets", "chu tich he snippets", "chu dinh he snippets", "chu trinh han snippets", "chu trinh hoa snippets", "chu trinh ky snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("chu trinh he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chu trinh he snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("chu trinh he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.