Perhaps you should try some spelling variations:
"cong thanh cay snippets" » "dong thanh cay snippets", "cong trinh cay snippets", "cong tan cay snippets", "cong thanh tay snippets", "cong nhanh cay snippets", "cong thanh ca 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 cay 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 cay snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong thanh cay snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong thanh cay snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.