Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
trung tuan » trung thanh, trung tam, tran tuan
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung cap, dung cua
hang cong » dang cong, hang nong, bang cong
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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: hoc thieu manh - hanh ((trung cua) OR (trung tuan)) hang cong ((dan toan) OR (van toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu manh - hanh ((trung cua) or (trung tuan)) hang cong ((dan toan) OR (van toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - hanh ((trung cua) or (trung tuan)) hang cong ((dan toan) OR (van toan)) cao*.