Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
thi van » thi lan, thi hanh, thi nang
xuc ban » duc ban, cuc ban, quoc ban
benh li » benh ly, benh lo, benh vi
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. thi van nam ((xuc ban) OR (duc tan)) benh li ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. thi van nam ((xuc ban) or (duc tan)) benh li ((cua tre) OR (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. thi van nam ((xuc ban) or (duc tan)) benh li ((cua tre) OR (cuu tre))*.