Perhaps you should try some spelling variations:
trinh phuong » trinh duong, trinh dung, trinh cong
tran phuong » tran phong, doan phuong, tai phuong
hanh trang » thanh trung, canh tranh, hanh trinh
trang cua » tranh cua, tang cua, trung cua
hoc dieu » hoc thieu, hoc hien
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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 trang cua ((tran phuong) OR (trinh phuong)) ((dan than) OR (dan chan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dieu hanh - hanh trang cua ((tran phuong) OR (trinh phuong)) ((dan than) or (dan chan)) ban~".
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - hanh trang cua ((tran phuong) OR (trinh phuong)) ((dan than) or (dan chan)) ban*.