Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tran » trung thanh, trung tam, hung tran
trung tuan » trung thanh, trung tam, tran tuan
hoc thieu » toc thieu, hoc hien
hung cong » nhung cong, hung cuong, phung cong
cong san » cong tac
than cau » toan cau, phan cau, than cap
toan tap » toan ban

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 - thanh ((trung tran) or (trung tuan)) hung cong san ((than cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((trung tran) OR (trung tuan)) hung cong san ((than cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trung tran) or (trung tuan)) hung cong san ((than cau) or (toan tap))*.