Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thanh dong » thanh duong, thanh cong, hanh dong
cong hoang » cong hoan, thong hoang, vuong hoang
hien xanh » hien hanh, chieu xanh, hien khanh
dung cong » dung trong
dong cua » dung cua, cong cua, huong cua
cua dung » cua dang, cua dong, qua dung
nhan dau » phan dau, nhan dan, nha dau
han dau » hang dau, phan dau, van dau

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)) - thanh dong cua dung cong hoang ((nhan dau) or (han dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - thanh dong cua dung cong hoang ((nhan dau) OR (han dau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - thanh dong cua dung cong hoang ((nhan dau) or (han dau))*".