Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
chat huu » pham huu
hieu van » hieu va, thien van, lieu va
nong va » nong van, dong va, cong va
sach tu » sach thu, cach tu, sach ty
nong xa » song xa, dong xa, cong xay
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: thuoc sach tu ((nong xa) or (nong va)) hoi. hieu van ((chao xu) or (chat huu)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach tu ((nong xa) OR (nong va)) hoi. hieu van ((chao xu) OR (chat huu)) van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach tu ((nong xa) or (nong va)) hoi. hieu van ((chao xu) or (chat huu)) van hanh vi cua tre*.