Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van trinh he snippets" » "van trinh code snippets", "van thinh he snippets", "van tinh he snippets", "dan trinh he snippets", "van trinh han snippets", "van trinh hoa snippets", "van 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: (((("van 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: (((("van trinh he snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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