Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
thi van » thi lan, thi hanh, thi nang
vai cua » dai cua, hai cua, lai cua
cam duc » cam xuc, cao duc, pham duc
sach tu » sach thu, cach tu, sach ty
nang co » nang cao, nang doc, nang noi
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
sac ky » cac ky, sai ky

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 tu) or (sac ky)) nang co hoi. ((thien van) OR (thi van)) cam duc va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tu) OR (sac ky)) nang co hoi. ((thien van) OR (thi van)) cam duc va thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tu) or (sac ky)) nang co hoi. ((thien van) OR (thi van)) cam duc va thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach tu) or (sac ky)) nang co hoi. ((thien van) OR (thi van)) cam duc va thanh vai cua tre*.