Perhaps you should try some spelling variations:
"chua khoa cong snippets" » "khuan khoa cong snippets", "cuu khoa cong snippets", "cu khoa cong snippets", "chua hoa cong snippets", "chua khoe cong snippets", "chua hoc 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: (((("chua khoa 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: (((("chua khoa cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chua khoa cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chua khoa cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.