Perhaps you should try some spelling variations:
pham huu » pham duc, pham duy, phan huy
thu nang » thi nang, thu hang, thu bang
nang dai » nang dau, nang tai, lang dai
van hanh » van thanh, ban hanh, van anh
bo sach » 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
dai hoi » dai hoc, dai hai, dai moi
so sanh » do sanh
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: ((bo sach) or (so sanh)) thu nang dai hoi. hieu ve pham huu ((va hanh) OR (van hanh)) hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (so sanh)) thu nang dai hoi. hieu ve pham huu ((va hanh) OR (van hanh)) hai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bo sach) or (so sanh)) thu nang dai hoi. hieu ve pham huu ((va hanh) OR (van hanh)) hai cua te*".