Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
thu nang » thi nang, thu hang, thu bang
hanh hai » thanh hai, nhanh hai, hang hai
so sach » so sanh, co sach, hoc sach
hai cua » thai cua, dai cua, hoi cua
bo sach » co sach, hoc sach
va hanh » van hanh, va thanh, va danh
chuc va » thuc va, thuc vat
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
cua te » cua tu
ma hoi » mai hoi, ma hoa, me hoi

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: ((so sach) OR (bo sach)) thu nang ((ma hoi) OR (xa hoi)). hieu ve pham chuc va hanh hai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) thu nang ((ma hoi) or (xa hoi)). hieu ve pham chuc va hanh hai cua te~".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (bo sach)) thu nang ((ma hoi) or (xa hoi)). hieu ve pham chuc va hanh hai cua te*.