Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
sach ky » sach y, sach ty, sach kem
sang ma » tang ma, nang ma, sang tao
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, xuc ban
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
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 ky) or (sac ky)) sang ma hoi. hieu vien cac xuc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) sang ma hoi. hieu vien cac xuc van hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) sang ma hoi. hieu vien cac xuc van hanh vi cua viet*.