Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung cap, dung cua
thong can » thong van, thong cac, thong cau
thong cap » thong cac, trung cap, thong cua
chan cac » phan cac, chon cac, nhan cach

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