Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue mang » thuat mang, thu hang, thu bang
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
mang xa » lang xa, mang may, dang xay
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach thue mang xa hoi. hieu ((va co) or (va cac)) duc va hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thue mang xa hoi. hieu ((va co) OR (va cac)) duc va hanh lai cua triet.
• Adding a wildcard symbol may retrieve word variants: toc sach thue mang xa hoi. hieu ((va co) or (va cac)) duc va hanh lai cua triet*.