Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"using java java snippets" » "using data java snippets"
"van duong thi snippets" » "van dong thi snippets", "van dung thi snippets", "van phong thi snippets", "van luong thi snippets", "van dang thi 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 duong thi snippets") or ("using java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van duong thi snippets") OR ("using java java snippets"))) OR ("locating bug core snippets"))*.
• Removing quotes may allow a broader search: (((( van duong thi snippets ) or ( using java java snippets ))) or ( locating bug core snippets ))*.