Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
nang co » nang cao, nang doc, nang noi
hai van » thai van, ha van, hai tan
su sach » so sach, vu sach
va nam » van nam, va nay
y nang » ky nang, ly nang, v nang
co hoi » co hoc, co loi
dai va » mai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang co hoi. hieu ((va nam) OR (ha nam)) thuc dan hanh ((dai va) or (hai van)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang co hoi. hieu ((va nam) OR (ha nam)) thuc dan hanh ((dai va) OR (hai van)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang co hoi. hieu ((va nam) OR (ha nam)) thuc dan hanh ((dai va) or (hai van)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang co hoi. hieu ((va nam) OR (ha nam)) thuc dan hanh ((dai va) or (hai van)) triet*.