Perhaps you should try some spelling variations:
nang vinh » nang kinh, nang sinh, dang vinh
toc sach » hoc sach, doc sach, thuoc sach
vinh cuu » dinh cuu, sinh cua, dinh cu
ban nang » ban hang, van nang, ban dang
pham cuc » pham chuc, pham duc, pham cua
cuc ban » cua ban, cac ban, cuu ban
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, su sach, vu khach
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham

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 (vu sach)) ky ((nang xa) OR (nang ma)) hoi. hieu v pham cuc ban nang vinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (vu sach)) ky ((nang xa) OR (nang ma)) hoi. hieu v pham cuc ban nang vinh cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (vu sach)) ky ((nang xa) OR (nang ma)) hoi. hieu v pham cuc ban nang vinh cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (vu sach)) ky ((nang xa) OR (nang ma)) hoi. hieu v pham cuc ban nang vinh cuu tre*.