Perhaps you should try some spelling variations:
thuoc sai » thuoc tai, thuoc san, thuoc sach
van hanh » van thanh, ban hanh, van anh
ve cham » va cham, ve chat, vu cham
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
xuc van » duc van, luc van, vuc van
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
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 van hanh ((vai cua) OR (lai 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 van hanh ((vai cua) OR (lai 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 van hanh ((vai cua) OR (lai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sai ky dang ma hoi. hieu ((ve cam) or (ve cham)) xuc van hanh ((vai cua) OR (lai cua)) tre*.