Perhaps you should try some spelling variations:
phat chuc » pham chuc, phap chuc, phap thuc
thi nang » thi cong, ki nang, thi hanh
hanh tai » thanh tai, hang tai, han tai
qua phat » qua nhat, qua phan, que phat
so sach » bo sach, co sach, hoc sach
chuc va » thuc va, thuc vat
tai cua » thai cua, tai cuc, tri cua
so sanh » do sanh
va hanh » van hanh, va thanh, va danh
cua te » cua tu
co hoi » co loi

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)) thi nang ((co hoi) OR (co hoc)). hieu qua phat chuc va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) thi nang ((co hoi) OR (co hoc)). hieu qua phat chuc va hanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) thi nang ((co hoi) OR (co hoc)). hieu qua phat chuc va hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) thi nang ((co hoi) OR (co hoc)). hieu qua phat chuc va hanh tai cua te*.