Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hoa viet da snippets" » "hoa viet code snippets", "hoa viet dao snippets", "hoa viet dat snippets", "hoa viet ha snippets", "khoa viet da 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: (((("hoa 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: (((("hoa viet da snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hoa viet da snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoa viet da snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.