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", "dung using data slippers"
"dong luc trac snippets" » "nang luc trac snippets", "dong luc tai snippets", "dong luc tam snippets", "dong huu trac snippets", "dong luc trac slippers"
"locating bug code snippets" » "locating bug code slippers", "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 ("dong luc trac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung using data snippets") OR ("dong luc trac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung using data snippets ) or ( dong luc trac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung using data snippets") or ("dong luc trac snippets"))) or ("locating bug code snippets"))*.