Perhaps you should try some spelling variations:
cang thong » cang thang, cong thong, mang thong
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
tieu xanh » tieu danh, chieu xanh, dieu hanh
thong cua » thong quan, thong tu, huong cua
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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 tieu xanh - cang thong cua ((nhung cong) OR (thong cong)) tac toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - cang thong cua ((nhung cong) OR (thong cong)) tac toan cao*.