Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van vung cac snippets" » "van vuong cac snippets", "van dung cac snippets", "van hung cac snippets", "van luong cac snippets", "van cuong cac snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("van vung cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van vung cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van vung cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van vung cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.