Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuoc sac » thuoc dac, thuoc sai, thuoc san
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
ve cham » va cham, ve chat, vu cham
vai cua » dai cua, hai cua, lai cua
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cac, va cam, ve cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sac) OR (thuoc sach)) ky dang ma hoi. hieu ((ve cam) or (ve cham)) xuc ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sac) OR (thuoc sach)) ky dang ma hoi. hieu ((ve cam) OR (ve cham)) xuc ban hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sac) OR (thuoc sach)) ky dang ma hoi. hieu ((ve cam) or (ve cham)) xuc ban hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sac) OR (thuoc sach)) ky dang ma hoi. hieu ((ve cam) or (ve cham)) xuc ban hanh vai cua tre*.