Perhaps you should try some spelling variations:
"luong java java snippets" » "luong va java snippets"
"danh viet some snippets" » "anh viet some snippets", "ninh viet some snippets", "nang viet some snippets", "danh viet song 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: (((("danh viet some snippets") or ("luong java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh viet some snippets") OR ("luong java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh viet some snippets ) or ( luong java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh viet some snippets") or ("luong java java snippets"))) or ("locating bug code snippets"))*.