Perhaps you should try some spelling variations:
te sach » toc sach
va tinh » may tinh
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
lang ha » long ha
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang xa) or (lang ha)) hoi. hieu va cac xuc ((va hanh) or (va tinh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (lang ha)) hoi. hieu va cac xuc ((va hanh) OR (va tinh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (lang ha)) hoi. hieu va cac xuc ((va hanh) or (va tinh)) vi cua tre*.