Perhaps you should try some spelling variations:
tham nhung » thi nhung
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh hang » thanh hang, hang hang, hanh han
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

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