Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien nhanh » thien thanh, tien thanh, dien thanh
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
van than » van thanh, van thang, van phan
van tuan » van quan, van ban, anh tuan

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 nhanh) or (hien hanh)) - thanh trung cua tong cong ((van than) OR (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - thanh trung cua tong cong ((van than) OR (van tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) or (hien hanh)) - thanh trung cua tong cong ((van than) OR (van tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (hien hanh)) - thanh trung cua tong cong ((van than) OR (van tuan)) cau*.