Perhaps you should try some spelling variations:
choi thuc » hoc thuc, hoi chuc, cho thue
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: choi thuc hanh - ((hanh tang) or (hanh mang)) cua nhung ((cong dan) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: choi thuc hanh - ((hanh tang) OR (hanh mang)) cua nhung ((cong dan) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: choi thuc hanh - ((hanh tang) or (hanh mang)) cua nhung ((cong dan) or (cong tac)) toan cau*.