Perhaps you should try some spelling variations:
"cong khoan mot snippets" » "cong hoan mot snippets", "cong khan mot snippets", "chung khoan mot snippets", "cong khoan hoi snippets", "cong chon mot snippets", "cong han mot 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 khoan mot 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 khoan mot snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong khoan mot snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong khoan mot snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.