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