Perhaps you should try some spelling variations:
dung dai » duong dai, dung tai, dung dat
nam dung » nam vung, nam dong, am dung
thu nam » tu nam, thu nhap, thu nhat
sach ky » sac ky, sach y, sach kem
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
le nam » ly nam, he nam, te nam
le na » le va, le ta, le ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach ty)) nang ma hoi. hieu ((le nam) or (le na)) thu nam dung dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang ma hoi. hieu ((le nam) OR (le na)) thu nam dung dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang ma hoi. hieu ((le nam) or (le na)) thu nam dung dai cua tre*.