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
thong can » thong van, thong cac, thong cap
can chan » dan chan, cam chan, ban chan
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) OR (hieu cach)) - thanh ((trung cua) or (trung tuan)) thong thong can chan cac~.
• 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)) thong thong can chan cac.
• 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)) thong thong can chan cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (hieu cach)) - thanh ((trung cua) or (trung tuan)) thong thong can chan cac*.