Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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 tranh cua nhung ((cong dan) or (cong tan)) ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh tranh cua nhung ((cong dan) OR (cong tan)) ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tranh cua nhung ((cong dan) or (cong tan)) ((than cau) or (phan cau))*.