Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
thu nang » thi nang, thu hang, thu bang
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, co sach, hoc sach
hai cua » thai cua, dai cua, hoi cua
va hanh » va thanh, va danh, ban hanh
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
nang ma » tang ma, sang ma, nang cao
bo sach » co sach, hoc sach
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 (bo sach)) thu nang ma hoi. hieu ve pham chuc ((va hanh) OR (van hanh)) hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) thu nang ma hoi. hieu ve pham chuc ((va hanh) OR (van 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. hieu ve pham chuc ((va hanh) OR (van hanh)) hai cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) thu nang ma hoi. hieu ve pham chuc ((va hanh) OR (van hanh)) hai cua te*.