Perhaps you should try some spelling variations:
duong manh » duong van
hien xanh » hien hanh, hien nhanh, chieu xanh
hinh kinh » hinh dinh, trinh kinh, hinh anh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cong manh » cong danh, cong thanh, hoang manh
cua dung » cua dang, cua dong, qua dung
toan cao » toan ban, toan tap

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 - ((hinh kinh) or (hanh tinh)) cua dung ((cong manh) or (duong manh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((hinh kinh) OR (hanh tinh)) cua dung ((cong manh) OR (duong manh)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((hinh kinh) or (hanh tinh)) cua dung ((cong manh) or (duong manh)) toan cao*.