Perhaps you should try some spelling variations:
"ung thuoc can snippets" » "dung thuoc can snippets", "luong thuoc can snippets", "trung thuoc can snippets", "ung thuoc ban snippets", "ung thuoc tan snippets", "ung thuc can snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("ung thuoc can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ung thuoc can snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ung thuoc can snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ung thuoc can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.