Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
lam duoc » nam duoc, luat duoc, lam thuoc
dua tren » dung tren
ly nang » ky nang, ly hang, ly vang
sach ly » sach y, sach lo, sach ty
va danh » va dinh, va hanh, dia danh
ma hoi » mai hoi, ma hoa, me hoi
va lam » van lam, va lap
va dan » ca dan, va dao, va dau
du dua » de dua, du dia, duc duat

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 ((ma hoi) OR (xa hoi)). lieu va lam duoc ((va danh) or (va dan)) du dua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ly nang ((ma hoi) OR (xa hoi)). lieu va lam duoc ((va danh) OR (va dan)) du dua tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ly nang ((ma hoi) OR (xa hoi)). lieu va lam duoc ((va danh) or (va dan)) du dua tren".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ly nang ((ma hoi) OR (xa hoi)). lieu va lam duoc ((va danh) or (va dan)) du dua tren*.