Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hanh tang » hanh trang, anh tang, hanh mang
hang cong » dang cong, hang nong, bang cong
ho chiet » ho chieu, hoc thiet, hoa thiet
ho thiet » hoc thiet, hoa thiet, so thiet
tang cua » mang cua, hang cua, tang luan
toan ban » van 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 chiet) or (ho thiet)) tach - hanh tang cua ((nhung cong) OR (hang cong)) tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho thiet)) tach - hanh tang cua ((nhung cong) OR (hang cong)) tinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) or (ho thiet)) tach - hanh tang cua ((nhung cong) OR (hang cong)) tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) or (ho thiet)) tach - hanh tang cua ((nhung cong) OR (hang cong)) tinh toan ban*.