Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
tuong dan » huong dan, tung dan, truong dai
xuong dan » huong dan, xuong san, nguong dan
ban cau » bang cau, ban can, ban dau
van cau » van dau, van hau, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - thanh trung cua thong ((tuong dan) or (xuong dan)) ((ban cau) or (van cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - thanh trung cua thong ((tuong dan) OR (xuong dan)) ((ban cau) OR (van cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - thanh trung cua thong ((tuong dan) or (xuong dan)) ((ban cau) or (van cau))*.