Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
truong cao » truong dai
hoc thieu » toc thieu, hoc hien
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
khan ap » khan cap, han ap, khan dam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((trung tuan) OR (truong cao)) thong ((cong tan) OR (cong san)) khan ap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh ((trung tuan) or (truong cao)) thong ((cong tan) OR (cong san)) khan ap~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trung tuan) or (truong cao)) thong ((cong tan) OR (cong san)) khan ap*.