Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
cac phuong » cac truong
chi xanh » chi anh, chi danh, chi hanh
toan cac » toan cao, toan cau, toan xac
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - tinh toan cac phuong cong tac toan ban~.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - tinh toan cac phuong cong tac toan ban*.