Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang ma » dang mau, dang mam, dang mat
va hanh » va thanh, va danh, ban hanh
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky dang ma hoi. hieu ((ve cam) or (va cam)) xuc ((va hanh) or (van hanh)) vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang ma hoi. hieu ((ve cam) OR (va cam)) xuc ((va hanh) OR (van hanh)) vi cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang ma hoi. hieu ((ve cam) or (va cam)) xuc ((va hanh) or (van hanh)) vi cua vat*.