Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
lap lai » lap tai, lay lai, lam lai
cac xuc » cam xuc, cac nuoc, chat xuc
su sach » so sach, vu sach
lap hai » lap tai, lap hoat, lanh hai
ky danh » ky anh, ky dang
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ky nang) or (ky danh)) ((lap hai) or (lap lai)). hieu vien cac xuc va dan vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky nang) OR (ky danh)) ((lap hai) OR (lap lai)). hieu vien cac xuc va dan vi cua tu.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky nang) or (ky danh)) ((lap hai) or (lap lai)). hieu vien cac xuc va dan vi cua tu*.