Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
tang luan » dung luan
hung cong » nhung cong, hung cuong, phung cong
ho chieu » theo chieu, doi chieu, mot chieu
anh tang » anh bang, anh dang, anh nang
van toan » van tuan, van tan, van thanh
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) sach - anh tang luan ((hung cong) or (trong cong)) van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - anh tang luan ((hung cong) OR (trong cong)) van toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - anh tang luan ((hung cong) or (trong cong)) van toan tap*".