Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh mang » nhanh mang, hanh trang, nhanh lang
mang luan » tang luan, hang luan, bang luan
luan dong » luan cong, quan dong, luan nong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan ban » van 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 hien xanh - hanh mang luan dong ((cong dan) or (cong san)) ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh mang luan dong ((cong dan) OR (cong san)) ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh mang luan dong ((cong dan) or (cong san)) ((toan tap) or (toan ban))*.