Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
huong luan » huong lan, cuong luan, huong loan
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cong san » cong tac
toan ban » van ban

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 thieu sach - anh huong luan nhung cong san ((toan tap) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - anh huong luan nhung cong san ((toan tap) or (toan ban))*.