Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
nhanh mang » nhanh lang, hanh mang, nhanh quang
nhung cong » dung cong, thong cong, hang cong
khoan cam » khoa cam, khoan va, phan cam
theo chu » cho chu, chao chu, theo yeu
cong san » cong tac
khan cap » khan ap, than cap, phan cac
mang va » mang vua, hang va, bang va

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 chieu) OR (theo chu)) xanh - nhanh mang va nhung cong san ((khan cap) OR (khoan cam))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) xanh - nhanh mang va nhung cong san ((khan cap) OR (khoan cam))~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) xanh - nhanh mang va nhung cong san ((khan cap) OR (khoan cam))*.