Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
toc sach » hoc sach, doc sach, thuoc sach
vien cac » vien bach, vien dai, vien da
cac bac » cac bai, cac ban, cac cach
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
bac va » ban va, bac ha, bao va
x hoi » xa hoi, o hoi, x ho
vi su » va su, ve su, ki su

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 x hoi. hieu vien cac bac va danh vi su tien~.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang x hoi. hieu vien cac bac va danh vi su tien*.