Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cam truc » cau truc, nam truc, lam truoc
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v 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 y nang xa hoi. ((hieu ve) OR (hieu van)) cam truc va hanh va su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. ((hieu ve) OR (hieu van)) cam truc va hanh va su triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. ((hieu ve) OR (hieu van)) cam truc va hanh va su triet*.