Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
hieu nganh » vien nganh, hiem ngan, hieu manh
thanh tung » thanh cong
dung cong » dung trong
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien danh) or (hieu nganh)) - thanh tung cua dung cong tac ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (hieu nganh)) - thanh tung cua dung cong tac ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) or (hieu nganh)) - thanh tung cua dung cong tac ((than cau) or (phan cau))*.