Perhaps you should try some spelling variations:
"chinh cong cong snippets" » "thanh cong cong snippets", "trinh cong cong snippets", "chinh cong dong snippets", "chinh trong cong snippets", "chinh dung cong snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("chinh cong cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chinh cong cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chinh cong cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chinh cong cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.