Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tim hiem cho snippets" » "tim hieu cho snippets", "tim kiem cho snippets", "tham hiem cho snippets", "tim viec cho 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 hiem cho 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 hiem cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tim hiem cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tim hiem cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.