Perhaps you should try some spelling variations:
nang duoc » ngang duoc, nang doc, nganh duoc
cau tren » cu tren, dau tren, ca tren
duoc hoi » quoc hoi, duoc hoc, duoc si
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va dan, dia danh
cuu tre » cua tre, cau treo
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
cam duc » cam xuc, cao duc, pham duc
van cam » van nam, van lam, van cau
tu nang » tru nang, tu nong, tu nano
va hanh » van hanh, va thanh, ban hanh

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 tu nang duoc hoi. hieu van cam duc ((va hanh) or (va danh)) va ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang duoc hoi. hieu van cam duc ((va hanh) OR (va danh)) va ((cuu tre) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang duoc hoi. hieu van cam duc ((va hanh) or (va danh)) va ((cuu tre) OR (cau tren))*".