Perhaps you should try some spelling variations:
sach tai » sach bai, sach tham, sach dao
tai lang » tai cong, thi lan, tai san
lang van » dang van, tang van, hoang van
cam thuc » am thuc, nam thuc, cam thu
vat hanh » vat thanh, van hanh, va hanh
hanh lai » hanh lam, hanh tai, thanh lap
su triet » su viet, su tien, ve triet
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
van hoi » van hoa, van hoc, van hoe
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao

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: su sach tai lang van hoi. hieu va cam thuc vat hanh lai ((su triet) OR (cua viet))~.
• Adding a wildcard symbol may retrieve word variants: su sach tai lang van hoi. hieu va cam thuc vat hanh lai ((su triet) or (cua viet))*.