Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien dang » thien bang, thien danh, thien nang
trang luan » tang luan, trang tuan, truong luan
tranh luan » trinh luan, trinh luat, doanh luan
dang cong » dung cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan 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 ((thien thanh) or (thien dang)) - hanh ((trang luan) OR (tranh luan)) dang cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (thien dang)) - hanh ((trang luan) OR (tranh luan)) dang cong san toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) or (thien dang)) - hanh ((trang luan) OR (tranh luan)) dang cong san toan tap*".