Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky ((mang xa) OR (lang xa)) hoi. hieu van nam thuc va hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky ((mang xa) OR (lang xa)) hoi. hieu van nam thuc va hanh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((mang xa) OR (lang xa)) hoi. hieu van nam thuc va hanh vi ((cua tre) OR (cuu tre))*.