Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
thong cong » trong cong, tong cong, thong thong
cong san » cong tac
san khan » san khau, san khac, san phan
khan cap » khan ap, than cap, khoan cam
mang va » mang vua, hang va, dang va
bang va » hang va, ban va, trang 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 tieu)) xanh - nhanh ((mang va) OR (bang va)) thong cong san khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo tieu)) xanh - nhanh ((mang va) or (bang va)) thong cong san khan cap~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo tieu)) xanh - nhanh ((mang va) or (bang va)) thong cong san khan cap*.