Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu nganh » hiem ngan, hieu manh, nghiep nganh
vien nganh » vien thanh
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu nganh) or (vien nganh)) - thanh trung cua ((tong cong) OR (cong cong)) tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (vien nganh)) - thanh trung cua ((tong cong) OR (cong cong)) tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (vien nganh)) - thanh trung cua ((tong cong) OR (cong cong)) tan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (vien nganh)) - thanh trung cua ((tong cong) OR (cong cong)) tan than cau*.