Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc anh
thien va » thien van, tien va, thien tai
cham tuc » nham thuc, pham thuc, tham thuc
dich dau » dich dao, tich dau, dich vu
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
va dich » van dich
dau cua » dai cua, day cua, cau cua
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 (((hoc sach) or (hoc cac)))) ky nang xa hoi. thien va cham tuc va dich dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (((hoc sach) OR (hoc cac)))) ky nang xa hoi. thien va cham tuc va dich dau cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (((hoc sach) or (hoc cac)))) ky nang xa hoi. thien va cham tuc va dich dau cua tre*.