Perhaps you should try some spelling variations:
"cong khanh cuc snippets" » "cong thanh cuc snippets", "cong khan cuc snippets", "cong nhan cuc snippets", "cong nhanh cuc snippets", "cong khanh quoc snippets", "cong hanh cac 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 khanh cuc 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 khanh cuc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong khanh cuc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong khanh cuc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.