Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"doi oi viet snippets" » "doi hoi viet snippets", "doi o viet snippets", "doi cuoi viet snippets", "doi voi viet snippets", "doi moi viet snippets", "doi boi viet snippets", "doi oi viet 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: "((((\"doi oi viet snippets\") OR (\"python using java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( doi oi viet snippets ) OR ( python using java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("doi oi viet snippets") OR ("python using java snippets"))) OR ("locating bug code snippets"))*.