Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung cap, dung cua
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong tan » cong tac, cong san, cong thanh
tran cao » toan cao, tran chau, trang cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - thanh ((trung cua) or (trung tuan)) thong cong tan tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - thanh ((trung cua) OR (trung tuan)) thong cong tan tran cao.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - thanh ((trung cua) or (trung tuan)) thong cong tan tran cao*.