Perhaps you should try some spelling variations:
luan trong » quan trong, luat trong, luan tuong
hien hanh » dieu hanh
hanh mang » nhanh mang, hanh trang, nhanh lang
mang luan » tang luan, hang luan, bang luan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
han tap » han tai, toan tap, nhan tai

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 mang luan trong ((cong dan) OR (cong tan)) han tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - hanh mang luan trong ((cong dan) OR (cong tan)) han tap".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh mang luan trong ((cong dan) OR (cong tan)) han tap*.