Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thien va » thien van, tien va, thien tai
cham tuc » nham thuc, pham thuc, tham thuc
dinh dat » dinh ket, dinh van, dinh lam
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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 y nang xa hoi. thien va cham tuc va dinh dat ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. thien va cham tuc va dinh dat ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. thien va cham tuc va dinh dat ((cua tre) or (su triet))*.