Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
va doanh » van doanh, vay doanh, va danh
sach ty » sach y, sach tu, sach thu
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu van
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
cuc tre » duc tre, cua tre, cuu tre
xuc va » duc va, tuc va, luc 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 ma) or (mang may)) hoi. ((hieu ve) OR (hieu va)) cac xuc va doanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty ((sang ma) OR (mang may)) hoi. ((hieu ve) OR (hieu va)) cac xuc va doanh tai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty ((sang ma) or (mang may)) hoi. ((hieu ve) OR (hieu va)) cac xuc va doanh tai cuc tre*".