Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cao danh de snippets" » "cao danh code snippets", "cao dang de snippets", "cao anh de snippets", "cau danh de snippets", "cao hanh de snippets", "cao dan de 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: (((("cao danh de snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao danh de snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cao danh de snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao danh de snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.