Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van dan hoc snippets" » "van dan code snippets", "van ban hoc snippets", "ban dan hoc snippets", "van dao hoc snippets", "van van hoc snippets", "van dan toc snippets", "van dai hoc 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 dan hoc 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 dan hoc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van dan hoc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van dan hoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.