Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
canh soanh » canh tranh, hanh doanh
cua phuong » cuu phuong, cuc phuong, luan phuong
oanh oanh » doanh doanh, hanh doanh, anh anh
hoc dieu » hoc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
chan dau » phan dau, han dau, chuan dao
doan » doanh, dan, toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu hanh - ((canh soanh) OR (oanh oanh)) cua phuong cong tan ((chan dau) or (chan doan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - ((canh soanh) OR (oanh oanh)) cua phuong cong tan ((chan dau) OR (chan doan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dieu hanh - ((canh soanh) OR (oanh oanh)) cua phuong cong tan ((chan dau) or (chan doan))".
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - ((canh soanh) OR (oanh oanh)) cua phuong cong tan ((chan dau) or (chan doan))*.