Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh tranh » canh tranh, hanh trinh, hanh trang
phuong van » phung van, phong van, phuong lan
ho chieu » hoc thieu, doi chieu, mot chieu
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
van toan » van tuan, van tan, van thanh
toan cau » 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: ((theo chieu) or (ho chieu)) sach - hanh tranh ((cua dung) OR (qua dung)) phuong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - hanh tranh ((cua dung) OR (qua dung)) phuong van toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (ho chieu)) sach - hanh tranh ((cua dung) OR (qua dung)) phuong van toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) sach - hanh tranh ((cua dung) OR (qua dung)) phuong van toan cau*.