Perhaps you should try some spelling variations:
nam duoc » nam thuoc, da duoc, dat duoc
sang mai » sang ma, sang tai, lang mai
danh sai » dung sai, danh bat, danh dau
danh lai » gianh lai, dinh lam, hanh lam
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang

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 ky sang mai hoi. hieu ve ((nam duoc) or (cam xuc)) va ((danh lai) OR (danh sai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky sang mai hoi. hieu ve ((nam duoc) OR (cam xuc)) va ((danh lai) OR (danh sai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky sang mai hoi. hieu ve ((nam duoc) or (cam xuc)) va ((danh lai) OR (danh sai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky sang mai hoi. hieu ve ((nam duoc) or (cam xuc)) va ((danh lai) OR (danh sai)) cua tre*.