Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » hanh trinh, hanh trang, lanh tranh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
manh toan » thanh toan, anh tuan, tinh toan
toan cau » 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: toc thieu xanh - ((hanh tranh) OR (canh tranh)) va ((nhung cong) OR (thong cong)) manh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu xanh - ((hanh tranh) or (canh tranh)) va ((nhung cong) OR (thong cong)) manh toan cau~".
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - ((hanh tranh) or (canh tranh)) va ((nhung cong) OR (thong cong)) manh toan cau*.