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

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (so sanh)) thu nang ma hoi. hieu ve pham chuc va hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) thu nang ma hoi. hieu ve pham chuc va hanh hai cua te.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) thu nang ma hoi. hieu ve pham chuc va hanh hai cua te*.