Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra hang doi snippets" » "tra nang doi snippets", "tri hang doi snippets", "tranh hang doi snippets", "tra hang di snippets", "tra hang loi snippets", "tra huong doi snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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