Perhaps you should try some spelling variations:
thanh tung » thanh cong
phuong van » phung van, phong van, phuong lan
hien sach » dien sach, kien sach, thien hach
tung tran » trung tran, hung tran, huong tran
tran bang » tran dang, tuan bang, tran quang
than cau » toan cau, phan cau, than cap
khan cap » than cap, khoan cam, phan cac
khan ap » 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 hien sach - thanh tung tran bang phuong van ((than cau) OR (((khan cap) OR (khan ap))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien sach - thanh tung tran bang phuong van ((than cau) or (((khan cap) OR (khan ap))))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - thanh tung tran bang phuong van ((than cau) or (((khan cap) OR (khan ap))))*.