Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va hanh » va thanh, va danh, ban hanh
y sang » _ sang, duy sang
ma hoi » mai hoi, ma hoa, me hoi
va cam » va cham, va cac, va cao
cua te » cua tu

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 y sang ((ma hoi) OR (xa hoi)). hieu va cam xuc ((va hanh) OR (van hanh)) dai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y sang ((ma hoi) or (xa hoi)). hieu va cam xuc ((va hanh) OR (van hanh)) dai cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach y sang ((ma hoi) or (xa hoi)). hieu va cam xuc ((va hanh) OR (van hanh)) dai cua te*.