Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van hoi hoc snippets" » "van hoi code snippets", "van choi hoc snippets", "van hoai hoc snippets", "van khoi hoc snippets", "van hoa hoc snippets", "van khoa hoc snippets", "van hoi chuc 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 hoi hoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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