Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, theo sach
trung tuan » trung thanh, trung tam, tran tuan
hieu cach » hieu cac, chieu sach, hieu ca
trung cua » truong cua, trung cap, dung cua
hang cong » dang cong, hang nong, bang 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 ((thieu sach) or (hieu cach)) - thanh ((trung cua) OR (trung tuan)) hang cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - thanh ((trung cua) OR (trung tuan)) hang cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (hieu cach)) - thanh ((trung cua) OR (trung tuan)) hang cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (hieu cach)) - thanh ((trung cua) OR (trung tuan)) hang cong san toan cau*.