Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh tang » hanh trang, anh tang, hanh mang
cong van » cong vang, song van, cong tan
cong san » cong tac
than cau » toan cau, phan cau, than cap
tang va » trang va, tang van, thang va
va nang » van nang, da nang, cam nang

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 sach - hanh tang va nang ((cong van) OR (cong san)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh tang va nang ((cong van) OR (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh tang va nang ((cong van) OR (cong san)) than cau*.