Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"
"so viec dat snippets" » "so vien dai snippets", "so vien da snippets", "so viec va snippets", "so viet dat snippets", "so vien dat snippets", "moi viec dat snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"so viec dat snippets\") OR (\"python using data snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( so viec dat snippets ) OR ( python using data snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("so viec dat snippets") OR ("python using data snippets"))) OR ("locating bug core snippets"))*.