Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"giao viet da snippets" » "giao viet code snippets", "gian viet da snippets", "giao vien da snippets", "gia viet da snippets", "giao viet dao snippets", "giao viet dat snippets", "giao viet ha snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data 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: (((("giao viet da snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("giao viet da snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( giao viet da snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("giao viet da snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.