Perhaps you should try some spelling variations:
cao thuc » cao thuoc, bao thuc, can thuc
hanh vai » hanh vi, hanh va, hanh tai
sach tru » sach truc, sach thu, sach tu
te sach » toc sach
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cau tren, cau treo
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
va cao » va cac, va co, va dao

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 tru ((nang xa) OR (nang x)) hoi. hieu va cao thuc va hanh vai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tru ((nang xa) OR (nang x)) hoi. hieu va cao thuc va hanh vai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tru ((nang xa) OR (nang x)) hoi. hieu va cao thuc va hanh vai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach tru ((nang xa) OR (nang x)) hoi. hieu va cao thuc va hanh vai ((cua tre) or (cuu tre))*.