Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thanh dai » thanh hai, thanh tai, thanh dat
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
cau tuc » cau truc, cau tu, cau luc
te sach » toc sach
van cau » van dau, van hau, van chat
tuc va » thuc va, truc va, tuc xa
v nang » va nang, vu nang, van nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky nang) OR (v nang)) xa hoi. hieu van cau tuc va thanh dai ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky nang) or (v nang)) xa hoi. hieu van cau tuc va thanh dai ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky nang) or (v nang)) xa hoi. hieu van cau tuc va thanh dai ((cua triet) OR (su triet))*.