Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet cho cuu snippets" » "viec cho cuu snippets", "viet co cuu snippets", "viet theo cuu snippets", "viet cho chu snippets", "viet cho cu snippets", "viet ho cuu 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: (((("viet cho cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet cho cuu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet cho cuu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet cho cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.