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