Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
danh hai » dang hai, lanh hai, manh hai
ban danh » ban doanh, ban hanh, ban dan
hai cua » thai cua, dai cua, hoi cua
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va
sach tu » sach thu, cach tu, sach ty
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua te » cua tu

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 tu ((nang xa) or (nang ma)) hoi. ((hieu va) OR (hieu qua)) cac xuc ban danh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach tu ((nang xa) OR (nang ma)) hoi. ((hieu va) OR (hieu qua)) cac xuc ban danh hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach tu ((nang xa) or (nang ma)) hoi. ((hieu va) OR (hieu qua)) cac xuc ban danh hai cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach tu ((nang xa) or (nang ma)) hoi. ((hieu va) OR (hieu qua)) cac xuc ban danh hai cua te*.