Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tim van toan snippets" » "tim van tuan snippets", "tim van tan snippets", "tim van thanh snippets", "tam van toan snippets", "tom van toan snippets", "tim ban toan 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: (((("tim van toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tim van toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tim van toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tim van toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.