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