Perhaps you should try some spelling variations:
"danh bat cong snippets" » "danh bat code snippets", "doanh bat cong snippets", "anh bai cong snippets", "dinh ba cong snippets", "danh bat dong snippets", "danh ban cong snippets", "danh bot cong 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: (((("danh bat cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh bat cong snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( danh bat cong snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh bat cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.