Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"nhat dan cac snippets" » "nhat dan code snippets", "nhat danh cac snippets", "nhat ban cac snippets", "nhan dan cac snippets", "nhat dan cach snippets", "nhat dang cac snippets", "nhat dan ca 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: (((("nhat dan 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: (((("nhat dan cac snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("nhat dan cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.