Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
hanh trang » thanh trung, canh tranh, hanh trinh
thong cong » trong cong, tong cong, thong thong
hanh tang » anh tang, hanh mang, hanh tung
chu xanh » chu manh, chieu xanh, chua xang
toan cau » toan cao, toan ban, toan tap
cho chu » cho thue

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: cho chu xanh - ((hanh tang) OR (hanh trang)) va ((nhung cong) OR (thong cong)) tinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cho chu xanh - ((hanh tang) or (hanh trang)) va ((nhung cong) OR (thong cong)) tinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: cho chu xanh - ((hanh tang) or (hanh trang)) va ((nhung cong) OR (thong cong)) tinh toan cau*.