Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hoc thiet » hoc thieu, hoc thuyet, hoc hien
ho chiet » ho chieu, ho thiet, hoa thiet
cong ban » cong bang, cong san, cong tan
ban khan » ban than, ban nhan, ban chan
khan cap » khan ap, than cap, khoan cam
di ung » do ung, vi ung, di chung
de ung » do ung, ke ung

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 (hoc thiet)) tach - hanh trung ((di ung) or (de ung)) cong ban khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (hoc thiet)) tach - hanh trung ((di ung) OR (de ung)) cong ban khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) OR (hoc thiet)) tach - hanh trung ((di ung) or (de ung)) cong ban khan cap".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) OR (hoc thiet)) tach - hanh trung ((di ung) or (de ung)) cong ban khan cap*.