Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tao viec cho snippets" » "tang viec cho snippets", "lam viec cho snippets", "dao viet cho snippets", "tao viec khoa snippets", "tao viec nhom snippets", "tao viec cua 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: (((("tao viec 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: (((("tao viec cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tao viec cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tao viec cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.