Perhaps you should try some spelling variations:
chiet tach » chieu sach
trung tuan » trung thanh, trung tam, truong thanh
tran tuan » tran xuan, tran quang, tran thanh
chinh cau » chinh chau, chinh ca, chinh can
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - thanh ((trung tuan) OR (tran tuan)) trong cong tan ((phan cau) or (chinh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung tuan) OR (tran tuan)) trong cong tan ((phan cau) OR (chinh cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((trung tuan) OR (tran tuan)) trong cong tan ((phan cau) or (chinh cau))".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung tuan) OR (tran tuan)) trong cong tan ((phan cau) or (chinh cau))*.