Perhaps you should try some spelling variations:
"danh cuu cong snippets" » "danh cuu code snippets", "dinh cuu cong snippets", "danh cau cong snippets", "doanh cua cong snippets", "danh cua cong snippets", "danh thu cong snippets", "danh cac 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 cuu 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 cuu cong snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( danh cuu cong snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh cuu cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.