Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
thu nang » thi nang, thu bang, tho nang
hanh tai » thanh tai, hang tai, han tai
thu hang » thuc hanh, thu huong, thu trang
thi hang » thi hanh, thi nang, thi hong
so sach » so sanh, bo sach, co sach
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
chuc va » thuc va, thuc vat
cao hoi » cau hoi, co hoi, cao hoc
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
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 ((thu nang) or (((thu hang) OR (thi hang)))) cao hoi. hieu ve pham chuc va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((thu nang) OR (((thu hang) OR (thi hang)))) cao hoi. hieu ve pham chuc va hanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((thu nang) or (((thu hang) OR (thi hang)))) cao hoi. hieu ve pham chuc va hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ((thu nang) or (((thu hang) OR (thi hang)))) cao hoi. hieu ve pham chuc va hanh tai cua te*.