Perhaps you should try some spelling variations:
thiet dang » thien dang, nhiet dong, nhiet nang
hoc thiet » hoc thieu, hoc thuyet, hoc hien
doanh cua » doanh luan
trung cua » truong cua, trung tuan, trung cap
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet dang - hanh ((doanh cua) or (trung cua)) nhung ((cong tan) or (cong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet dang - hanh ((doanh cua) OR (trung cua)) nhung ((cong tan) OR (cong tac)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thiet dang - hanh ((doanh cua) or (trung cua)) nhung ((cong tan) or (cong tac)) toan ban*.