Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, lieu vien
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien dai, vien da
tu chung » tu vung, tu cong
te sach » toc sach
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
cho hoc » co hoc, khoa hoc
tu hung » tu nhung, tu vung, vu hung
tu hang » thu hang, tu hanh, ty hang
cua cau » cua cac, cua chu, cua cay
vi cua » vai cua, di cua

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 ((tu hang) OR (((tu hung) OR (tu chung)))) cho hoc. hieu vien cac xuc van hanh vi cua cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu hang) or (((tu hung) OR (tu chung)))) cho hoc. hieu vien cac xuc van hanh vi cua cau~".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu hang) or (((tu hung) OR (tu chung)))) cho hoc. hieu vien cac xuc van hanh vi cua cau*.