Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
nang dieu » dang dieu, sang dieu, bang dieu
dieu cua » dieu tra
vien cac » vien bach, vien dai, vien da
va nang » van nang, da nang, cam nang
cac bac » cac bai, cac ban, cac cach
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach
bac va » ban va, bac ha, bao va
tu sac » tu cac, tu san, tu bac

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: ((tu sac) OR (((tu sach) OR (su sach)))) ky nang xa hoi. hieu vien cac bac va nang dieu cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (((tu sach) OR (su sach)))) ky nang xa hoi. hieu vien cac bac va nang dieu cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (((tu sach) OR (su sach)))) ky nang xa hoi. hieu vien cac bac va nang dieu cua tre*.