Perhaps you should try some spelling variations:
truong cong » truong dong, truong long, truong chung
doi chieu » doc hieu, doi chi, mot chieu
hanh hang » thanh hang, hang hang, hanh han
ho chieu » theo chieu, hoc thieu, mot chieu
tac tuan » tac quan, ta tuan, tai tuan
tuan cau » toan cau, quan cau, tuan cu

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: ((doi chieu) OR (ho chieu)) sach - hanh hang va ((truong cong) OR (trong cong)) tac tuan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) sach - hanh hang va ((truong cong) OR (trong cong)) tac tuan cau~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) sach - hanh hang va ((truong cong) OR (trong cong)) tac tuan cau*.