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