Perhaps you should try some spelling variations:
toc sach » hoc sach, thuoc sach, nuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
doc sach » hoc sach, nuoc sach, dac sac
dinh dat » dinh ket, dinh van, dinh lam
dinh dau » dinh du, danh dau, dinh dao
thien va » thien van, tien va, thien tai
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (doc sach)) ky nang xa hoi. thien va cham tuc va ((dinh dau) or (dinh dat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky nang xa hoi. thien va cham tuc va ((dinh dau) OR (dinh dat)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ky nang xa hoi. thien va cham tuc va ((dinh dau) or (dinh dat)) cua tre*.