Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet cho hoi snippets" » "viec cho hoi snippets", "viet co hoi snippets", "viet theo hoi snippets", "viet cho hoc snippets", "viet cho moi snippets", "viet cho doi 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 hoi 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 hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet cho hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet cho hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.