Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
hanh vai » hanh vi, hanh va, hanh tai
co thuc » do thuc, co thua, mo thuc
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach y nang ((ma hoi) or (ma hoa)). lieu va co thuc va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach y nang ((ma hoi) OR (ma hoa)). lieu va co thuc va hanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: doc sach y nang ((ma hoi) or (ma hoa)). lieu va co thuc va hanh vai cuu tre*.