Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hien hanh » dieu hanh
hanh tran » thanh tran, hanh tram, thanh trang
luan hoan » luan van
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 - ((hanh tran) OR (hanh trang)) ((quan hoang) or (luan hoan)) cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((hanh tran) OR (hanh trang)) ((quan hoang) OR (luan hoan)) cong dan chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - ((hanh tran) OR (hanh trang)) ((quan hoang) or (luan hoan)) cong dan chan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - ((hanh tran) OR (hanh trang)) ((quan hoang) or (luan hoan)) cong dan chan cau*.