Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xang ma » tang ma, nang ma, sang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, ban hanh
va danh » va dan, dia danh, va thanh
va dinh » van dinh, va kinh, va tinh
hai cua » thai cua, dai cua, hoi cua
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: tu sach ty xang ma hoi. hieu va cham duc ((va hanh) or (((va danh) or (va dinh)))) hai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang ma hoi. hieu va cham duc ((va hanh) OR (((va danh) OR (va dinh)))) hai cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang ma hoi. hieu va cham duc ((va hanh) or (((va danh) or (va dinh)))) hai cua vat*.