Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
thong cong » trong cong, tong cong, thong thong
theo chu » cho chu, chao chu, theo yeu
trang va » tran van, hang va
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
tang va » tang van, thang va, tang vat

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