Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh trung » thanh trung, hanh trang, manh trung
hoc thiet » hoc thieu, hoc thuyet, hoc hien
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 » ke duong

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

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