Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van phan du snippets" » "van phan code snippets", "van phong du snippets", "van thanh du snippets", "luan phan du snippets", "van phan dau snippets", "van phan duc snippets", "van phan dua 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 phan du 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 phan du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van phan du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van phan du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.