Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, truong thanh
trung cua » truong cua, trung tuan, trung cap
cong tan » cong tac, cong san, cong ty
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 sach - thanh trung cua vat ((cong thanh) or (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung cua vat ((cong thanh) OR (cong tan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung cua vat ((cong thanh) or (cong tan)) toan cau*.