Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vien cac xe snippets" » "vien bach xe snippets", "vien dai xe snippets", "vien da xe snippets", "vien cac he snippets", "vien cac ke snippets", "vien cac le 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: (((("vien cac 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: (((("vien cac xe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vien cac xe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vien cac xe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.