Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thieu anh » thien anh, chieu xanh, thien danh
hung cong » nhung cong, hung cuong, phung cong
cong than » cong thanh, cong thang, cong tan
than phan » thanh phan, toan phan, thanh pham
toan hoc » toan khoa, van hoc, hoa hoc
hoc hung » hoc huong, hoc nhung, hoc ung
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 toan hoc hung cong than phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu anh) OR (chieu sach)) - tinh toan hoc hung cong than phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu anh) or (chieu sach)) - tinh toan hoc hung cong than phan cac*.