Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
trong tan » trong quan, trong cac, cong tan
cua dong » chua dong, cua dang, cua nong
trong ca » trong cac, trong nha
toan tap » toan 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 - hanh tranh ((cua dong) OR (cua cong)) ((trong tan) OR (trong ca)) toan tap~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh tranh ((cua dong) or (cua cong)) ((trong tan) or (trong ca)) toan tap*.