Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
trang va » tran van, hang va
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
tang va » tang van, thang va, tang vat

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