Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
ve cham » va cham, ve chat, vu cham
vai cua » dai cua, hai cua, lai cua
anh vai » anh va, anh bai, anh van
van anh » van thanh, tuan anh, van minh
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, me hoi
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 hoi) or (ma hoa)). hieu ((ve cam) or (ve cham)) duc van anh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky dang ((ma hoi) OR (ma hoa)). hieu ((ve cam) OR (ve cham)) duc van anh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky dang ((ma hoi) or (ma hoa)). hieu ((ve cam) or (ve cham)) duc van anh vai cua tre*.