Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trung » thanh trung, hanh trang, manh trung
trung vat » trung va, trung van, trong vat
vat trong » viet trong, cay trong, dot trong
ho chieu » hoc thieu, doi chieu, mot chieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
khan cap » khan ap, than cap, khoan cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) tinh - hanh trung vat trong ((cong dan) OR (cong tan)) khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) tinh - hanh trung vat trong ((cong dan) or (cong tan)) khan cap~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) tinh - hanh trung vat trong ((cong dan) or (cong tan)) khan cap*.