Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
hanh ve » hanh vi, hanh va, hanh kem
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sach y, sach ty, sach kem
qua cac » cua cac
nang xa » nang x, lang xa, nang ma
su viet » so viet
sac ky » cac ky, sai ky

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)) nang xa hoi. hieu qua cac xuc van hanh ve ((va triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu qua cac xuc van hanh ve ((va triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang xa hoi. hieu qua cac xuc van hanh ve ((va triet) or (su viet))*.