Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
duong che » dung che, luong che, duong cham
tong cong » trong cong, cong cong, dung cong
dong che » dong chen, dong cho, cong che
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac

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 - thanh ((duong che) OR (dong che)) tong cong tan than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh ((duong che) OR (dong che)) tong cong tan than cap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((duong che) OR (dong che)) tong cong tan than cap*.