Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
ban hanh » ban hang
dat tren » dat trong, dua tren
may hoi » may thoi, tay hoi, mai hoi
hieu va » lieu va, hieu qua
cau xuc » cam xuc, cau luc, cau truc
xuc ban » duc ban, cuc ban, quoc ban
y mang » cay mang
va cau » van cau, va cac, va dau
vi dat » voi dat, vi dai, va dat

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) or (thuat sach)) y mang may hoi. hieu va cau xuc ban hanh vi dat tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) y mang may hoi. hieu va cau xuc ban hanh vi dat tren.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat sach)) y mang may hoi. hieu va cau xuc ban hanh vi dat tren*.