Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
su triet » su tien, ve triet
hanh lam » thanh lap, hanh kem, hanh va
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hang xa » hoang xa, hang va, hang ca
ty hang » ly hang, ty xang, thi hang
su viet » so viet
tuc va » thuc va, truc va, tuc xa

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: tu sach ty hang xa hoi. hieu ((ve cham) OR (vien cac)) tuc va hanh lam ((su triet) OR (su viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty hang xa hoi. hieu ((ve cham) or (vien cac)) tuc va hanh lam ((su triet) OR (su viet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty hang xa hoi. hieu ((ve cham) or (vien cac)) tuc va hanh lam ((su triet) OR (su viet))*.