Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
doi cua » dai cua, hoi cua, dong cua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet

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