Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
dung cong » dung trong
hang nong » thang long, han tong
dan hanh » dang hanh, dan khanh, dan thanh
dan han » dan chan, dan than, dan phan

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 xanh - hanh tranh cua ((dung cong) OR (hang nong)) ((dan han) OR (dan hanh)) tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh tranh cua ((dung cong) or (hang nong)) ((dan han) OR (dan hanh)) tu~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh tranh cua ((dung cong) or (hang nong)) ((dan han) OR (dan hanh)) tu*.