Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
phap nuoc » nha nuoc, cap nuoc, phap hoc
dang thai » dang thi, dang hai, dang khai
hac nuoc » hoc nuoc, cac nuoc, nhat nuoc
cua tre » cua te, cua triet, dua tren
va dang » van dang, va nang, va lang
cuu tre » cau tren, cau treo
sach ky » sac ky, sach y, sach ty
thi van » thi lan, thi hanh, thi nang
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. thi van ((hac nuoc) OR (phap nuoc)) va dang thai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang x hoi. thi van ((hac nuoc) OR (phap nuoc)) va dang thai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang x hoi. thi van ((hac nuoc) OR (phap nuoc)) va dang thai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang x hoi. thi van ((hac nuoc) OR (phap nuoc)) va dang thai ((cua tre) or (cuu tre))*.