Perhaps you should try some spelling variations:
dung sai » dung tai, dung va, dung dat
danh sai » danh bat, danh dau, hanh san
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach
thuc xa » thuc xay, tuc xa, thuc va
cua tre » cua te, cuu tre, cua triet
hieu le » hieu ve, hieu he, hieu ly
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
vu sach » vu bach, vu khach
ma hoi » mai hoi, xa hoi, ma hoa
le nam » ly nam, he nam, le na

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) or (vu sach)) ky tang ma hoi. hieu le nam thuc xa ((danh sai) or (dung sai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky tang ma hoi. hieu le nam thuc xa ((danh sai) OR (dung sai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky tang ma hoi. hieu le nam thuc xa ((danh sai) or (dung sai)) cua tre*.