Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi quy con snippets" » "dot quy con snippets", "doi duy con snippets", "noi quy con snippets", "doi quy don snippets", "doi qua con snippets", "doi quyen con 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.

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