Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
thanh toan » thanh hoa, thanh san, tinh toan
manh toan » anh tuan, tinh toan
hinh va » chinh va, hanh va, sinh va
tinh va » tich va, trinh van, trinh vat

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: theo chieu xanh - hanh ((hinh va) OR (tinh va)) nhung cong ((manh toan) OR (thanh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - hanh ((hinh va) OR (tinh va)) nhung cong ((manh toan) or (thanh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - hanh ((hinh va) OR (tinh va)) nhung cong ((manh toan) or (thanh toan)) cau*.