Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
hien hanh » dieu hanh
hanh hang » thanh hang, hang hang, hanh han
hang luan » tang luan, dung luan
luan dong » luan cong, quan dong, luan nong
dong cong » duong cong, dung cong, dang cong
cong tan » cong tac, cong san, cong thanh
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien hanh) or (tien thanh)) - hanh hang luan dong cong tan ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (tien thanh)) - hanh hang luan dong cong tan ((toan cau) OR (toan cao))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien hanh) or (tien thanh)) - hanh hang luan dong cong tan ((toan cau) OR (toan cao))*".