Perhaps you should try some spelling variations:
nam duoc » nam thuoc, da duoc, nam moc
dinh dai » dinh dat, sinh dai, dinh dao
sang mai » sang ma, sang tai, lang mai
dat duoc » dat nuoc, da duoc, luat duoc
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, va tinh
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet

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 va ((((nam duoc) or (dat duoc))) or (cam xuc)) va dinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky sang mai hoi. hieu va ((((nam duoc) OR (dat duoc))) OR (cam xuc)) va dinh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky sang mai hoi. hieu va ((((nam duoc) or (dat duoc))) or (cam xuc)) va dinh dai cua tre*.