Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
thong cong » trong cong, tong cong, thong thong
hanh tang » hanh trang, anh tang, hanh mang
theo yeu » theo tieu, thiet yeu, theo chu
va thong » va thuong, va phuong, he thong
tran tap » toan tap, tran tuan, trang tai
tran tan » tran tuan, tran van, tran thanh
theo te » theo tu, theo tieu
tang va » trang va, tang van, thang va

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: ((theo te) OR (theo yeu)) sach - hanh tang va thong cong thanh ((tran tap) OR (tran tan))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo te) or (theo yeu)) sach - hanh tang va thong cong thanh ((tran tap) OR (tran tan))~".
• Adding a wildcard symbol may retrieve word variants: ((theo te) or (theo yeu)) sach - hanh tang va thong cong thanh ((tran tap) OR (tran tan))*.