Perhaps you should try some spelling variations:
phuong toan » phong toan, phuong tran, phuong doan
dung phuong » dung thuong, bang phuong, dung chung
thanh tung » thanh cong
hanh trung » thanh trung, hanh trang, manh trung
toan thang » toan thong, thanh thang, tran thanh
thang cau » hang cau, thong cau, thanh chau
chi xanh » chi anh, chi danh, chieu xanh
chi hanh » chi nhanh, chi thanh, thi hanh
cua dung » cua dang, cua dong, qua dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi xanh) OR (chi hanh)) - ((hanh trung) or (thanh tung)) cua dung phuong toan thang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi hanh)) - ((hanh trung) OR (thanh tung)) cua dung phuong toan thang cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi xanh) OR (chi hanh)) - ((hanh trung) or (thanh tung)) cua dung phuong toan thang cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) OR (chi hanh)) - ((hanh trung) or (thanh tung)) cua dung phuong toan thang cau*.