Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van nhi cac snippets" » "van chi cac snippets", "van noi cac snippets", "van nghe cac snippets", "van nhe cac snippets", "van khai cac snippets", "van nhin cau 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 nhi 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 nhi cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van nhi cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van nhi cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.