Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
hieu vien » hieu hien, hieu viec, thieu nien
va triet » va thiet, va trien, ve triet
cac thuc » cach thuc, cac thu, can thuc
vien cac » vien bach, vien dai, vien da
vu nang » vuc nang, va nang, vu dang
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
v nang » va nang, van nang, voi nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((v nang) or (vu nang)) xa hoi. hieu vien cac thuc va hanh di ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (vu nang)) xa hoi. hieu vien cac thuc va hanh di ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) or (vu nang)) xa hoi. hieu vien cac thuc va hanh di ((cua triet) or (va triet))*.