Perhaps you should try some spelling variations:
"hoang tra chat snippets" » "hoang tra code snippets", "hoang tran chat snippets", "hoang tru chat snippets", "hoang trang chat snippets", "hoang tran chau snippets", "hoang tran nhat snippets", "hoang hoa chat snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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: (((("dung java java snippets") or ("hoang tra chat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("hoang tra chat snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("hoang tra chat snippets"))) or ("locating bug core snippets"))*.