Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van toan da snippets" » "van toan code snippets", "van tuan da snippets", "van tan da snippets", "van thanh da snippets", "van toan dam snippets", "van toan dai snippets", "van toan dau snippets"
"python using java snippets" » "python using data snippets"

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

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