Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"co don cua snippets" » "co dong cua snippets", "co doi cua snippets", "co con cua snippets", "co dan cua snippets", "co dot cua 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 (\"co don cua snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using java snippets ) OR ( co don cua snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") OR ("co don cua snippets"))) OR ("locating bug code snippets"))*.