Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"tra trinh vat snippets" » "qua trinh vat snippets", "tra trinh van snippets", "tra trinh luat snippets", "tra sinh vat snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java core snippets") or ("tra trinh vat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java core snippets") OR ("tra trinh vat snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( tra trinh vat snippets ))) or ( locating bug code snippets ))*.