Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cao danh cac snippets" » "cao danh code snippets", "cao dang cac snippets", "cao anh cac snippets", "cau danh cac snippets", "cao dinh cac snippets", "cao danh ca snippets", "cao hanh cac snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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