Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
truc va » thuc va, thuc vat, trung va
tai cua » thai cua, tai cuc, tri cua
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 van cac ((duc va) or (truc va)) hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van cac ((duc va) OR (truc va)) hanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van cac ((duc va) or (truc va)) hanh tai cua triet*.