Perhaps you should try some spelling variations:
sach daon » sach danh, sach dat, sach han
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
sach dao » lanh dao
su triet » su viet, ve triet
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
nang xa » nang x, lang xa, nang ma
su tien » su kien, su hien, tu tieng

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 daon) or (sach dao)) nang xa hoi. hieu vien cac xuc van hanh vi ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach daon) OR (sach dao)) nang xa hoi. hieu vien cac xuc van hanh vi ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach daon) or (sach dao)) nang xa hoi. hieu vien cac xuc van hanh vi ((su triet) or (su tien))*.