Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"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 trinh co snippets" » "cong trinh do snippets", "cong trinh cong snippets", "cong trinh hoa 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 trinh co snippets") or ("dung using data snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong trinh co snippets") OR ("dung using data snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( cong trinh co snippets ) or ( dung using data snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong trinh co snippets") or ("dung using data snippets"))) or ("locating bugs code snippets"))*.