Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban hanh » ban hang
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
cac dat » cac dan, cai dat, cac dai
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ty nang ma hoi. lieu va cac dat ((va hanh) or (ban hanh)) ((vi cua) OR (di cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty nang ma hoi. lieu va cac dat ((va hanh) OR (ban hanh)) ((vi cua) OR (di cua)) vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty nang ma hoi. lieu va cac dat ((va hanh) or (ban hanh)) ((vi cua) OR (di cua)) vat".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty nang ma hoi. lieu va cac dat ((va hanh) or (ban hanh)) ((vi cua) OR (di cua)) vat*.