Perhaps you should try some spelling variations:
choc chinh » cuoc chinh, cho chinh, chon chinh
trung tuan » trung thanh, trung tam, tran tuan
hoc chinh » hoan chinh, hoc sinh, hoc kinh
trung cua » truong cua, trung cap, dung cua
dong cong » duong cong, dung cong, dang cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
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: ((hoc chinh) or (choc chinh)) sach - thanh ((trung cua) OR (trung tuan)) dong cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chinh) OR (choc chinh)) sach - thanh ((trung cua) OR (trung tuan)) dong cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chinh) or (choc chinh)) sach - thanh ((trung cua) OR (trung tuan)) dong cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc chinh) or (choc chinh)) sach - thanh ((trung cua) OR (trung tuan)) dong cong san toan cau*.