Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hanh tu » anh tu, danh tu
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
tu cua » hu cua, vu cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky tang ma hoi. hieu ((ve cam) or (va cham)) luc va hanh tu cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky tang ma hoi. hieu ((ve cam) OR (va cham)) luc va hanh tu cua vat*.