Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"ban tu cao snippets" » "ban tu code snippets", "van tu cao snippets", "ban cu cao snippets", "ban tu cac snippets", "ban vu cao snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python missing data snippets") or ("ban tu cao snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python missing data snippets") OR ("ban tu cao snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python missing data snippets ) or ( ban tu cao snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python missing data snippets") or ("ban tu cao snippets"))) or ("locating bug core snippets"))*.