Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nam duoc » nam thuoc, da duoc, dat duoc
va thanh » gia thanh, ban thanh, va tinh
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
san cuu » san cua, san huu, song cuu
cuu tre » cua tre, cau tren, cau treo
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ly nang ((o hoi) OR (o hai)). hieu va ((nam duoc) or (pham duc)) va thanh san cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ly nang ((o hoi) OR (o hai)). hieu va ((nam duoc) OR (pham duc)) va thanh san cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ly nang ((o hoi) OR (o hai)). hieu va ((nam duoc) or (pham duc)) va thanh san cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ly nang ((o hoi) OR (o hai)). hieu va ((nam duoc) or (pham duc)) va thanh san cuu tre*.