Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
dung phong » dung phuong, duong phong, rung phong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua
phong van » phung van, thong van, phong va
manh cua » doanh cua, ban cua
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu

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 ((hieu manh) OR (thien thanh)) - canh ((tranh cua) OR (manh cua)) dung phong van tuan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (thien thanh)) - canh ((tranh cua) OR (manh cua)) dung phong van tuan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien thanh)) - canh ((tranh cua) OR (manh cua)) dung phong van tuan cau*.