Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
va cham » va chat, va tham
hai cua » thai cua, dai cua, hoi cua
xuc van » duc van, luc van, vuc van
ve cham » ve chat, vu cham, ve chim
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
ve cam » ve cac, va cam, ve cai
ma hoi » mai hoi, xa hoi, ma hoa

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 ky dang ma hoi. hieu ((ve cam) or (((ve cham) or (va cham)))) xuc van hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky dang ma hoi. hieu ((ve cam) OR (((ve cham) OR (va cham)))) xuc van hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky dang ma hoi. hieu ((ve cam) or (((ve cham) or (va cham)))) xuc van hanh hai cua tre*.