Perhaps you should try some spelling variations:
nam truc » nam truoc, nam thuc, nam trung
su triet » su viet, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
ve nam » he nam, va nam, le nam

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 y nang xa hoi. hieu ve nam truc va hanh va ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ve nam truc va hanh va ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ve nam truc va hanh va ((su triet) or (su tien))*.