Perhaps you should try some spelling variations:
hieu nganh » hiem ngan, hieu manh, nghiep nganh
vien nganh » vien thanh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
cong cua » cong cu, dong cua, huong cua
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu nganh) or (vien nganh)) - thanh cong cua nhung cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (vien nganh)) - thanh cong cua nhung cong tan tran tap.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu nganh) or (vien nganh)) - thanh cong cua nhung cong tan tran tap*.