Perhaps you should try some spelling variations:
thuoc ban » thuoc tan, thuoc dang, thu ban
cao thuoc » cay thuoc, cua thuoc, nam thuoc
cua viet » ca viet, hoa viet, cua vat
cau treo » cau theo, cau tren, cau triet
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ban ban » ban banh, van ban, can ban
va cao » va cac, va co, va dao
ban vi » ban voi, ban va, ban ve
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. hieu va cao thuoc ban ban vi ((cua tre) or (((cau treo) or (cua viet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu va cao thuoc ban ban vi ((cua tre) OR (((cau treo) OR (cua viet)))).
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu va cao thuoc ban ban vi ((cua tre) or (((cau treo) or (cua viet))))*.