Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
kien sach » dien sach, vien bach, kien mac
trung cua » truong cua, trung tuan, trung cap
hoc kien » hoc hien, hoc vien, hoa kien
tung cua » tuong cua, dung cua, tang cua
cong san » cong tac
toan ban » van 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 kien sach - thanh ((tung cua) or (trung cua)) thong cong san ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kien sach - thanh ((tung cua) OR (trung cua)) thong cong san ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc kien sach - thanh ((tung cua) or (trung cua)) thong cong san ((toan tap) or (toan ban))*.