Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » hanh trinh, hanh trang, lanh tranh
chong cong » cong cong, thong cong, cuong cong
hoc thieu » toc thieu, hoc hien
cua chong » cua cong, cua chung, cua khong
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
toan cao » 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) OR (canh tranh)) cua chong cong tan ((toan ban) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((hanh tranh) OR (canh tranh)) cua chong cong tan ((toan ban) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh tranh) OR (canh tranh)) cua chong cong tan ((toan ban) or (toan cao))*.