Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
duoc tren » nuoc tren, thuoc tren, dung tren
sang tao » hang tai
tai duoc » tao duoc, tan duoc, mai duoc
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
tao hoi » tao khoi, tao boi, tay hoi
hieu va » lieu va, hieu qua
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

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 ty sang tao hoi. hieu va cac ((xuc va) OR (luc va)) doanh tai duoc tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty sang tao hoi. hieu va cac ((xuc va) OR (luc va)) doanh tai duoc tren".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty sang tao hoi. hieu va cac ((xuc va) OR (luc va)) doanh tai duoc tren*.