Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, nhung don
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap

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