Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"lai hoi dung snippets" » "lai hoc dung snippets", "lai noi dung snippets", "lai hoi dong snippets", "dai hoi dung snippets", "lai hoa dung snippets", "lai roi dung snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("lai hoi dung snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lai hoi dung snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("lai hoi dung snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.