Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dang tran can snippets" » "dang tran code snippets", "dang thanh can snippets", "quang tran can snippets", "hoang tran can snippets", "dang tran van snippets", "dang tran tan snippets", "dang toan 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 ("dang tran 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 ("dang tran can snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dang tran can snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dang tran can snippets"))) or ("locating bug core snippets"))*.