Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
theo chieu » theo tieu, ho chieu, thi chieu
theo chu » cho chu, chao chu, theo yeu
hang tai » hang va, dung tai
mang cua » manh cua, dung cua, ban cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

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