Perhaps you should try some spelling variations:
"luong java java snippets" » "luong va java snippets"
"dung tin cac snippets" » "dong tin cac snippets", "luong tin cac snippets", "dung tren cac snippets", "dung ton cac snippets", "dung tinh cach snippets", "dung trinh cac 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: (((("luong java java snippets") or ("dung tin cac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong java java snippets") OR ("dung tin cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong java java snippets ) or ( dung tin cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong java java snippets") or ("dung tin cac snippets"))) or ("locating bug code snippets"))*.