Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"lua gan hang snippets" » "lua ngan hang snippets", "lua ban hang snippets", "lua van hang snippets", "luat gan hang snippets", "lua gao hang snippets", "luat ngan hang snippets"

Try widening your search to All Fields.

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