Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"trinh van can snippets" » "trinh van code snippets", "trinh han can snippets", "trinh quan can snippets", "trinh toan can snippets", "trinh van canh snippets", "trinh van ban snippets", "trinh ban can snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

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

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