Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
trinh luan » trinh luat, trinh han, trinh toan
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
dan chan » dan gian, dan ca, van chat
chan cap » khan cap, than cap, cao cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (ho chieu)) sach - hanh ((trinh luan) or (trinh quan)) nhung huong dan chan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) sach - hanh ((trinh luan) OR (trinh quan)) nhung huong dan chan cap.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) sach - hanh ((trinh luan) or (trinh quan)) nhung huong dan chan cap*.