Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
cua phuong » cuu phuong, cuc phuong, luan phuong
hanh hang » thanh hang, hanh han, hanh mang
hang hang » nang hang, cang thang, hung thang
hoc dieu » hoc thieu, hoc hien
cong san » cong tac
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - ((hanh hang) OR (hang hang)) cua phuong cong san ((phan cau) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dieu hanh - ((hanh hang) OR (hang hang)) cua phuong cong san ((phan cau) or (phan dau))~".
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - ((hanh hang) OR (hang hang)) cua phuong cong san ((phan cau) or (phan dau))*.