Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"van tuan a snippets" » "van quan a snippets", "van ban a snippets", "anh tuan a snippets", "van tuan q snippets", "van juan a snippets", "van tuan anh snippets"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van tuan a snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( van tuan a snippets ) or ( python using java snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("van tuan a snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.