Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
hieu van » thien van, lieu va, hieu ve
cham tuc » nham thuc, pham thuc, tham thuc
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (thuoc sach)) ky nang x hoi. ((hieu van) OR (hieu va)) cham tuc va thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (thuoc sach)) ky nang x hoi. ((hieu van) OR (hieu va)) cham tuc va thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (thuoc sach)) ky nang x hoi. ((hieu van) OR (hieu va)) cham tuc va thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (thuoc sach)) ky nang x hoi. ((hieu van) OR (hieu va)) cham tuc va thanh vi cua triet*.