Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
lang van » dang van, tang van, hoang van
tham xuc » tham nuoc, tham thuc, pham duc
lang xa » lang ha, dang xay
sach tu » sach thu, cach tu, sach ty
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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 tu ((nang x) or (((lang xa) or (lang van)))) hoi. hieu va tham xuc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu ((nang x) OR (((lang xa) OR (lang van)))) hoi. hieu va tham xuc va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach tu ((nang x) or (((lang xa) or (lang van)))) hoi. hieu va tham xuc va hanh di cua tre*.