Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, dua tren
tuc va » thuc va, truc va, tuc xa
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: toc sach ky nang x hoi. hieu ve cham tuc va ((dinh tri) or (chinh tri)) ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang x hoi. hieu ve cham tuc va ((dinh tri) OR (chinh tri)) ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang x hoi. hieu ve cham tuc va ((dinh tri) or (chinh tri)) ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang x hoi. hieu ve cham tuc va ((dinh tri) or (chinh tri)) ((cua tre) OR (cua triet))*.