Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
nang hang » nang sang, hang hang, cang thang
cua tong » cua cong, cua dong, cua nong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
ca tong » ca trong, cap tong, ca ong

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - nang hang ((ca tong) OR (cua tong)) cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - nang hang ((ca tong) OR (cua tong)) cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - nang hang ((ca tong) OR (cua tong)) cong tac toan cao*.