Perhaps you should try some spelling variations:
"cau duc hoan snippets" » "cau duc code snippets", "cau duc hoang snippets", "cau duc hoa snippets", "cau duc toan snippets", "cao duc hoan snippets", "cau luc hoan snippets", "chu duc hoan snippets"
"locating bug core snippets" » "locating bug code 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: (((("python using java snippets") or ("cau duc hoan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("cau duc hoan snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("cau duc hoan snippets"))) or ("locating bug core snippets"))*.