Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
hieu lang » chieu sang, hieu quang, nhieu tang
manh cua » doanh cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((manh cua) OR (ban cua)) phuong cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((manh cua) OR (ban cua)) phuong cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((manh cua) OR (ban cua)) phuong cong tac toan cao*.