Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van xac cao snippets" » "va xac cao snippets", "van xay cao snippets", "van hac cao snippets", "van xa cao snippets", "van bac cao snippets", "van mach cao 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 xac cao 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 xac cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van xac cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van xac cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.