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 van » tran van, trinh van, thanh van
dung cong » dung trong
van dung » van dong, xay dung, tin dung
ty thanh » ta thanh, tu thanh, te thanh
ty than » te than, tu than, thuy than

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 xanh - hanh tranh van dung cong ((ty than) OR (ty thanh)) cao~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh tranh van dung cong ((ty than) OR (ty thanh)) cao*.