Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
thien dang » thien bang, thien danh, thien nang
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » 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 ((thien chanh) or (thien dang)) - hanh tang luan dang cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien chanh) OR (thien dang)) - hanh tang luan dang cong dan toan cau*.