Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"nhac dan cua snippets" » "nhac dan code snippets", "nhan dan cua snippets", "hoc dan cua snippets", "cac dan cua snippets", "nhac dan ca snippets", "nhac ban cua snippets", "nhac dai cua 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: (((("nhac dan cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhac dan cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("nhac dan cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.