Perhaps you should try some spelling variations:
tam thuc » tham thuc, am thuc, nam thuc
va thanh » gia thanh, ban thanh, va tinh
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va danh, ban hanh
va tam » van tam, va tham, va tac
ma hoi » mai hoi, xa hoi, ma hoa
vi 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: thu sach ky nang ma hoi. lieu va tam thuc ((va hanh) or (va thanh)) ((vi cua) OR (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ma hoi. lieu va tam thuc ((va hanh) OR (va thanh)) ((vi cua) OR (vai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ma hoi. lieu va tam thuc ((va hanh) or (va thanh)) ((vi cua) OR (vai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoi. lieu va tam thuc ((va hanh) or (va thanh)) ((vi cua) OR (vai cua)) triet*.