Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, chieu xanh, hien khanh
trang cua » tranh cua, trung cua, thang cua
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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