Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cao nang » cao dang, cam nang, cao tang
cam luc » cau luc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
va dan » ca dan, va dao, va dau
dan de » dan den, dang de, van de
de cua » le cua, te cua, dieu cua
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 ((v nang) or (cao nang)) x hoi. hieu va ((cam luc) or (cam xuc)) va dan de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((v nang) OR (cao nang)) x hoi. hieu va ((cam luc) OR (cam xuc)) va dan de cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((v nang) or (cao nang)) x hoi. hieu va ((cam luc) or (cam xuc)) va dan de cua tre*.