Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cho tu chat snippets" » "cho tu code snippets", "cho tu phat snippets", "cho tu cham snippets", "cho du chat snippets", "choi tu chat snippets", "chon tu chat snippets", "cho cu chat snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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