Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam truc » cau truc, nam truc, lam truoc
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
so sach » so sanh, bo sach, co sach
hieu va » hieu qua
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, su sach, vu khach
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: ((so sach) or (vu sach)) y nang xa hoi. ((hieu va) OR (lieu va)) cam truc va hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu sach)) y nang xa hoi. ((hieu va) OR (lieu va)) cam truc va hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (vu sach)) y nang xa hoi. ((hieu va) OR (lieu va)) cam truc va hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu sach)) y nang xa hoi. ((hieu va) OR (lieu va)) cam truc va hanh vai cua triet*.