Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van tuy hoa snippets" » "van tuy code snippets", "van thuy hoa snippets", "van duy hoa snippets", "van huy hoa snippets", "van tay hoa snippets", "van tu hoa 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: (((("van tuy hoa snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van tuy hoa snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van tuy hoa snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tuy hoa snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.