Perhaps you should try some spelling variations:
truong luan » truong quan, truong luat, truong quang
phuong cong » phuong dong, phong cong, phung cong
trung luan » trung tuan, trung quan, truong luat
mot chieu » doi chieu
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

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