Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van nhan xe snippets" » "van phan xe snippets", "van thanh xe snippets", "danh nhan xe snippets", "van nhan xu snippets", "van nha xe snippets", "van nhan ve 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 nhan xe 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 nhan xe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van nhan xe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van nhan xe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.