Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"van van tham slippery" » "van van thanh slippery", "van van tuan slippery", "van van chat slippery", "van ban tham slippery", "tan van tham slippery", "san van tham slippery", "van van tham slippers"

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 van tham slippery"))) or ("locating bug core snippets"))~.
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