Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"cho can tran snippets" » "cho can tranh snippets", "cho tan tran snippets", "cho ban tran snippets", "cho cac tran snippets", "cho phan tran snippets", "cho cong tran 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 ("cho can tran snippets"))) or ("locating bug core snippets"))~.
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