Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
dang mam » dang nam, dang mau, dang mat
ve cham » va cham, ve chat, vu cham
vai cua » dai cua, hai cua, lai cua
xuc van » duc van, luc van, xuc ban
cua tre » cua te, cuu tre, cua triet
dang ma » dang mau, dang mat, tang ma
sac ky » cac ky, sai ky
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 ky ((dang ma) OR (dang mam)) hoi. hieu ((ve cam) or (ve cham)) xuc van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky ((dang ma) OR (dang mam)) hoi. hieu ((ve cam) OR (ve cham)) xuc van hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sac ky ((dang ma) OR (dang mam)) hoi. hieu ((ve cam) or (ve cham)) xuc van hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky ((dang ma) OR (dang mam)) hoi. hieu ((ve cam) or (ve cham)) xuc van hanh vai cua tre*.