Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"tra cho tang snippets" » "tra cao tang snippets", "tra kho tang snippets", "tra cho hang snippets", "trang cho tang snippets", "tra chat tang snippets", "toan cho tang snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("tra cho tang snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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