Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"pha hang dam snippets" » "pham hang dam snippets", "nha hang dam snippets", "pham thang dam snippets", "pha chang dam snippets", "pha hang dau snippets", "pha hang nam 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 ("pha hang dam snippets"))) or ("locating bug core snippets"))~.
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