Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thieu anh » thien anh, chieu xanh, thien danh
tinh tran » tinh trang, tinh toan, tinh than
tran khoa » toan khoa, san khoa, nhan khoa
khoa ung » khoa dung, hoa ung, khoa trung
ung cong » dung cong, luong cong, duong cong
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cac » nhan cach, phan dau, phan lap

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 anh) or (chieu sach)) - tinh tran khoa ung cong tan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu anh) OR (chieu sach)) - tinh tran khoa ung cong tan phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu anh) or (chieu sach)) - tinh tran khoa ung cong tan phan cac*.