Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
tran tuan » tran xuan, tran quang, tran thanh
hang cong » dang cong, hang nong, bang cong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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