Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
mang cua » manh cua, dung cua, cong cua
tac tuan » tac quan, tai tuan, tac tuyen
ban cua » ban quan
ta tuan » tai tuan, a tuan, ba tuan

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