Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van dung » van dong, xay dung, tin dung
phuc van » thuc van, phuc va, chuc van
cua tre » cua te, cua triet, dua tren
van dau » van dao, phan dau
van cau » van hau, van chat, toan cau
nang ma » tang ma, sang ma, nang cao
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
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: thuoc sach y nang ma hoi. hieu ((van cau) OR (van dau)) phuc van dung tai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang ma hoi. hieu ((van cau) OR (van dau)) phuc van dung tai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang ma hoi. hieu ((van cau) OR (van dau)) phuc van dung tai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang ma hoi. hieu ((van cau) OR (van dau)) phuc van dung tai ((cua tre) or (cuu tre))*.