Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
tinh vai » tinh va, tinh hai, tinh bai
dang vat » dang van, dong vat, dang nhat
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, cua triet
dang ma » dang mau, dang mam, dang mat
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
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 vat)) hoi. hieu ((ve cam) or (ve cham)) tuc va tinh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky ((dang ma) OR (dang vat)) hoi. hieu ((ve cam) OR (ve cham)) tuc va tinh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky ((dang ma) or (dang vat)) hoi. hieu ((ve cam) or (ve cham)) tuc va tinh vai cua tre*.