Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"manh cuu xac snippets" » "manh cua xac snippets", "mang cua xac snippets", "dinh cuu xac snippets", "manh cuu dac snippets", "manh cuu cac snippets", "manh cuu xay snippets"

Try widening your search to All Fields.

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