Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
huong cua » dung cua
chu xanh » chu manh, chieu xanh, chua xang
hang cua » mang cua, hang ca, thong cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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: theo ((chu xanh) OR (hieu lang)) - hanh ((hang cua) OR (huong cua)) nhung cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (hieu lang)) - hanh ((hang cua) OR (huong cua)) nhung cong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (hieu lang)) - hanh ((hang cua) OR (huong cua)) nhung cong dan toan cau*.