Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
sang tao » hang tai
sach kem » hanh kem
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
tao hoi » tao khoi, tao boi, tay hoi
vien da » vien dai, hien dai
xuc van » duc van, luc van, vuc van
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach kem) or (sac ky)) sang tao hoi. hieu vien da xuc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sac ky)) sang tao hoi. hieu vien da xuc van hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sac ky)) sang tao hoi. hieu vien da xuc van hanh vi cua viet*.