Perhaps you should try some spelling variations:
"dung using data snippets" » "dung ung data snippets", "dung sinh data snippets", "dung uong data snippets", "dung using java snippets", "dung using sat snippets", "dung missing data snippets"
"cong coc cham snippets" » "cong cuoc cham snippets", "cong cac cham snippets", "cong co cham snippets", "cong toc cham snippets", "cong moc cham 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: (((("dung using data snippets") or ("cong coc cham snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung using data snippets") OR ("cong coc cham snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung using data snippets ) or ( cong coc cham snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung using data snippets") or ("cong coc cham snippets"))) or ("locating bug code snippets"))*.