Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"dan viet vi snippets" » "danh viet vi snippets", "san viet vi snippets", "dao viet vi snippets", "dan viet voi snippets", "dan diet vi snippets", "dan viet gi snippets", "dan viet vi slippers"
"locating bug code snippets" » "locating bug code slippers", "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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dan viet vi snippets\") OR (\"python using java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dan viet vi snippets ) OR ( python using java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dan viet vi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets"))*.