Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"thi tran dam snippets" » "thi trang dam snippets", "thi thanh dam snippets", "thi lan dam snippets", "thi toan dam snippets", "thi tran day snippets", "thi tran lam snippets"

Try widening your search to All Fields.

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