Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien dai, vien da
sach ty » sach y, sach tu, sach thu
va hanh » va thanh, va danh, ban hanh
xang xa » lang xa, mang xa, ang xa
su sach » so sach, vu sach
va cam » va cham, va cac, va cao
lam ve » la ve, lam vu, nam ve

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