Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
nang cau » nang cao, hang cau, nang dau
vien cac » vien bach, vien dai, vien da
sach ky » sac ky, sach ty, sach kem
cac xuc » cam xuc, cac nuoc, chat xuc
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
luu tre » luu tru, cuu tre, luy tre
xuc va » duc va, tuc va, luc va
vi luu » vi lua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) nang cau hoi. hieu vien cac xuc va danh vi luu tre~.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) nang cau hoi. hieu vien cac xuc va danh vi luu tre*.