Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
canh trang » canh tranh, hanh trang, banh trang
hoc thieu » toc thieu, hoc hien
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
trang va » tran van, hang va
ty phan » ly phan, tu phan, tai phan

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - canh trang va ((hang cong) OR (dang cong)) ty phan tu~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh trang va ((hang cong) OR (dang cong)) ty phan tu*.