Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"hoa van ca snippets" » "hoa dan ca snippets", "hoang van ca snippets", "hoa phan ca snippets", "hoa van cau snippets", "hoa van cua snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

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