Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
nhan dang » nhan dan, phan dang, tran dang
cong san » cong tac
cong tan » cong tac, cong thanh, cong ty
phan cau » phan dau, phan cac, phan tu
dang va » dang van, dang vat, hang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (hoc thieu)) sach - nhan dang va nhung ((cong san) or (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) sach - nhan dang va nhung ((cong san) OR (cong tan)) phan cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc thieu)) sach - nhan dang va nhung ((cong san) or (cong tan)) phan cau*.