Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
hach toan » thanh toan, manh toan
tac toan » tap toan, tam toan, tich toan

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