Perhaps you should try some spelling variations:
nam luoc » nam buoc, nam quoc, nam thuoc
nam duoc » nam thuoc, da duoc, dat duoc
chat hoa » thuat hoa, chat va, chat huu
van anh » van thanh, tuan anh, van minh
te sach » toc sach
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
anh va » hanh va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ((cao hoi) or (chat hoa)). hieu va ((nam luoc) OR (nam duoc)) van anh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((cao hoi) OR (chat hoa)). hieu va ((nam luoc) OR (nam duoc)) van anh va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((cao hoi) or (chat hoa)). hieu va ((nam luoc) OR (nam duoc)) van anh va cua tre*".