Perhaps you should try some spelling variations:
tat thang » nam thang, van thang, dat hang
toc sach » hoc sach, doc sach, thuoc sach
day hang » dat hang, dai hang, day nang
nam thuc » nam thuoc, am thuc, nam thu
cuu tre » cua tre, cau tren, cau treo
hieu he » hieu ve, hiem he, hieu le
nang ma » tang ma, sang ma, nang cao
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa
di cuu » di cau, di cua, dinh cuu
he nam » ha nam, nghe nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (so sach)) ky nang ma hoi. hieu he nam thuc ((day hang) or (tat thang)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (so sach)) ky nang ma hoi. hieu he nam thuc ((day hang) OR (tat thang)) di cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (so sach)) ky nang ma hoi. hieu he nam thuc ((day hang) or (tat thang)) di cuu tre*.