Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hoc ngoc » hoc nuoc, ho ngoc, loc ngoc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tre » cuu tre, cua triet, dua tren
va hoc » van hoc
va dap » va dao, va dau
ca dan » cac dan, ca dao
cua te » cua tu

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: thu sach ky nang xa hoi. lieu va hoc ngoc ((va dap) OR (ca dan)) dieu ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. lieu va hoc ngoc ((va dap) or (ca dan)) dieu ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. lieu va hoc ngoc ((va dap) or (ca dan)) dieu ((cua tre) OR (cua te))*.