Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van tri hoc snippets" » "van tri code snippets", "van tai hoc snippets", "van thi hoc snippets", "van toi hoc snippets", "van triet hoc snippets", "van tri thuc snippets", "van thai hoc 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: (((("python using java snippets") or ("van tri hoc snippets"))) or ("locating bug core snippets"))~.
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