Perhaps you should try some spelling variations:
chinh luan » chinh ngan, trinh luan, binh luan
vuong tuan » vuong quan, duong tuan, vuong tan
mot chieu » doi chieu
vong tuan » cong tuan, hoang tuan, trong tuan
ho chieu » theo chieu, hoc thieu, doi chieu
luan dan » luan danh, luan van, luat dan
dan cong » dang cong, van cong, dan dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (ho chieu)) sach - hanh chinh luan dan cong ((vong tuan) OR (vuong tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (ho chieu)) sach - hanh chinh luan dan cong ((vong tuan) OR (vuong tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (ho chieu)) sach - hanh chinh luan dan cong ((vong tuan) OR (vuong tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (ho chieu)) sach - hanh chinh luan dan cong ((vong tuan) OR (vuong tuan)) cau*.