Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
sach tu » sach thu, cach tu, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
cua tu » cua tuc, cua su, cua cu

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: thuoc sach tu ((nang ma) OR (tang ma)) hoi. hieu va cac xuc van hanh lai ((cua tu) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach tu ((nang ma) OR (tang ma)) hoi. hieu va cac xuc van hanh lai ((cua tu) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: thuoc sach tu ((nang ma) OR (tang ma)) hoi. hieu va cac xuc van hanh lai ((cua tu) or (cua triet))*.