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