Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"ban ham hung snippets" » "ban pham hung snippets", "ban cam hung snippets", "ban ha hung snippets", "ba ham hung snippets", "ban hang hung snippets", "ban hanh hung snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("ban ham hung snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban ham hung snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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