Perhaps you should try some spelling variations:
"luong thuc cham snippets" » "thuong thuc cham snippets", "phuong thuc cham snippets", "luong thi cham snippets", "luong thuc pham snippets", "luong phuc cham snippets", "luong thuc chan 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: (((("luong thuc cham snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong thuc cham snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong thuc cham snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong thuc cham snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.