Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
theo chieu » ho chieu, theo chu, thi chieu
hang cong » dang cong, hang nong, bang cong
hanh han » hanh nhan, hanh phan, hanh san
tam toan » tap toan, tam than, pham toan
toan ban » van ban
han cua » hang cua, nhan cua, than cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (theo tieu)) sach - hanh han cua ((nhung cong) OR (hang cong)) tam toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) sach - hanh han cua ((nhung cong) OR (hang cong)) tam toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo tieu)) sach - hanh han cua ((nhung cong) OR (hang cong)) tam toan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) sach - hanh han cua ((nhung cong) OR (hang cong)) tam toan ban*.