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